Depends on how strong you are.
I had bonnet mounted spares for years and while it was not a problem for me there was no way that my wife could even consider lifting the bonnet.
If you go for it then you will need the correct stay (the folding type) as it is stronger than the prop.
Have you considered a swingaway carrier, keeps the wheel on the back but does not interfere with tub space?
I did have a bonnet mount on my 2a of years ago, no problem lifting the 7 50 16 SAT. however I did once fail to set the folding prop correctly and it fell on me as I lent in. The bonnet catch struck me in the back just off to the side of the spine. There was no penetration but some severe bruising and it was painful for weeks after.
Still kept the wheel on the bonnet just made sure prop was properly set. As an aside I remember someone did some aerodynamic tests on the very unaerodynamic Landy and found they were improved a fair bit with the wheel on the bonnet.
That sounds very painful. Interesting to hear of improved aero' with wheel on bonnet, would really like to see this info'
The article was in 4X4 magazine over thirty years ago If I remember correctly.
Some have fitted a gas strut booster to help lift the bonnet.
Useful info, that. Ta.There are heavy duty striker pin springs which overcome the weight of the spare wheel an allows the bonnet to pop-up when you pull the bonnet release cable. This makes it possible to open the bonnet with only one person. Handy.
MUC4803 upto chassis TA983377
ASR1229 after that but not TD5.