The Ashcroft conversion kit will be a real bargain at only £26,000 plus vat and fitting, in the meantime I would consult with James Martin regarding the cable tension or possibly adjusting the selector in the transfer crank box doo-dad. As for a roll bar, you could use TerraFirma chequer plate storage boxes arranged in a arch configuration to completely encase you and give you more important storage for flowers and Tampax. This will affect your fuel consumption a tad though, so maybe you should consider filling the tires with Nitrogen as all hard core off-roaders use that! Don't forget safety first either, I do hope you wear a Hi-vis jacket with "one life, live it"? Naturally you will want to change your seat like everyone else does, I can suggest a deck chair or bean bag works well.