28-06-16, 08:25 PM
Well I tried today...sorry no pics...Three layers of blue foam but no test ride yet as its pissing down here now 
I have only temporarily replaced the cover because I want to do a road trial first. At the moment I'm thinking it may be a touch soft.
I did follow your lead and cut out a similar box for the replacement foam to sit in. If I want something firmer I may try a layer or two of carpet foam underlay in the seat. That is around 10mm thick so may be more versatile.
D

I have only temporarily replaced the cover because I want to do a road trial first. At the moment I'm thinking it may be a touch soft.
I did follow your lead and cut out a similar box for the replacement foam to sit in. If I want something firmer I may try a layer or two of carpet foam underlay in the seat. That is around 10mm thick so may be more versatile.
D