110 Suspension / Twin shocks questions

Setup:
'89 110 with petrol engine. Twin rear dampers.

Use:
Daily commuting (in Africa - so a fair amount of offroad) plus safaris and overland travel. So, needs to be able to have good daily suspension to absorb deep potholes and also the ability to carry load offroad once or twice a month for 3-4 day trips.

Situation:
About to travel from Nairobi to Zambia for new contract, then will attempt rebuild onto a new chassis with revised suspension.


Questions:
What's the deal with twin damper turrets? Obvious answer is that they allow the use of twin dampers... But what benefits would that bring considering my circumstances? I need to revise the suspension to absorb the huge potholes and broken asphalt that is a constant feature of Kenyan roads. I also want to be able to drive washboard bumps in comfort (i.e. the Namanga - Amboseli road which is roughly 1.5 hours of washoard/stutter bumps and destroys my 110.) Yet at times I'll be carrying full overland gear ... I have dual dampers already as the vehicle was used in the Mara as an executive safari vehicle.

I seem to have wheels waiving in the air a lot offroad so would like to increase articulation/clearance. I'd like all that, and my cake, and to eat it. Would those air assist bags that go in the springs be an option for when I'm loaded up offroad, or are they not robust enough? My first reaction was to plan on complete overkill with dual dampers and lifting, plus larger radial tyres. Oh, did I forget to mention I've got crossply tires...

So, in short - soft suspension for more comfort that ramps up to protect the car on bigger hits, better articulation and/or bigger wheels and load carrying ability sometimes...

Any thoughts, links to good threads, or so forth would be appreciated, particularly from those with overland experience. I figured dual shocks would allow some extra protection and redundancy.

Dual shocks half the loads on each shock. Less loading = less chance of shocks failing, But there have been lots of reports of the dual mountings snapping off. So make sure you get a good set. For the rear suspension I'd go for UK Police spec springs as these have a second helper spring inside the main spring. Try to keep it as simple and as uncomplicated as possible. You might want to PM SeekingSerenity as her and her partner are based in SA and both are into their landys and have modded them for the sorts of driving your planning.

Thanks for the post. Are the second helper springs removable? Ideally I'd like supple suspension which I can toughen up to take the extra load when required, which is why I was thinking about those airbag helper springs. So double dampers front and rear would be a bonus? Or too complex?

3Link Front Suspension Kit from Qt Services Limited
Hi-Flex Rear Suspension Kit - Defender 90 from Qt Services Limited

Overkill? My first aim is to tackle the half foot deep potholes that suddenly appear when you're doing 80kph and also to tame stutter bumps. Next priority is off road articulation and finally load carrying.

Finally, anyone heard of equipe4x4? (Produzione) A lot of their stuff looks familiar. Does one or two suppliers supply the majority of these guys? I've been looking at a lot of sites and there is a lot of familiarity between these kits.

Thanks for looking, sorry if this is newbie stuff...!

The idea is to have a long travel compliant suspension, The twin shocks is to allow them to share the work, as this is what kills them due to overheating, as when on corrugations By having two you can set them so that they dont have to damp so strongly as coil springs are hard work compared to leafs (less internal friction so less damping in the spring)
I experienced this when OME first brought out shocks for the 110 , next to useless , driving along beach headlands in OZ my tool box was leaving the floor in the back as they werenot damping enough and the amplitude was therefore increasing.
You need to lose the crossply tyres, as these dont suit the suspension, and they last less than half the miles a radial will Also they have to be inflated hard and then the sidewalls are stiffer.
The tyres and the springs are the shock absorber, what people call shock absorbers are dampers if you get what I mean.
Your main loading is going to be in the rear so the 130 setup is probably going to give you a good result and depending on what you run around with loadwise when you are not traveling removing the helper spring could well serve your purpose. HTSH

So, a high articulation kit won't necessarily mean shocking road handling?

I'm erring towards longer travel, softer springs and twin dampers. Both the spring rate increasing with compression and the dampers ramping up under big hits.

The rear helper spring seems the ticket, but is the HelperAir thing not more infinitely adjustable?

Thanks for your patience.