Hi

intend to keep updated. Box was a bit dearer than wanted 250 quid you can get the newer crisp white bt box for 100 quid on ebay but the wheel arches are higher and for me in the wrong place. The older ones dont invade the inetrior.

i did cut back of myself bit by bit as floor bolts were rusted areas difficult to get floor grinder into especially around folded box sections sometimes grinder wasn't bigger enough or to big. Just too are time (i day)

The problem with this type of box is that it has a skirt all the way around the bottom which start to clash with bits like wheels and tank so we had to lift it higher then i would have liked for clearance

The other issue is that its only about 6" 2 ft inside so you will need to be short or use extreme insulation in regarding keeping tHe height down Im going to ad a pop roof however always getting higher!

However the space created below provideds plenty of space for tanks and cubby lockers. If i did it again I think would go for a second hand straight insulated box from a company peteit forester!

but the advantage of the bt is its cheap one piece construction it also has a double wall construction inside that I ,am going to attempt to fill with two back closed cell foam.

Very possible but apparently have to make sure that you place plenty of 10 mm holes inside to insure foam has spread and not left spaces that can act as a cold bridge.

I wonder if i will ever get there but hey its worth it just to spend some time with the scruffy old bloke in pics (dad)

learning curve is massive but fun

keep the advice coming

Mark