There are Airfix "Vintage" kits and then there is the Airfix Churchill, more challenge than nostalgic joy, but satisfying nevertheless (see below, one look at the picture and old-timers will know where I am coming from - "bogie wheels are us"):
Apparently there is a clever - "keep it on the sprue until the last moment" - technique I have never been privy to (see below, one done bar the turret, the other WIP, plenty of glue being used to keep everything in place):
Both ready for their tops, but one will have a twist (see below, when you get as far as this point there is a certain "downhill from here on in" satisfaction as you sip your tea, with the 'hard bit' well behind you):
A standard Normandy 75mm Mk VII turret and a "bridge layer" - yes it is that "add on bit" to the vintage kit model. Airfix seemed to go through a phase of taking an old standard kit then adding a specialist sprue on - Churchill Crocodile, Churchill Bridge Layer, Sherman Flail, Sherman Calliope and Matilda Hedgehog .. all good stuff (see below, my final Churchills are now made, small question of painting and decals):
The Airfix Bridge Layer Churchill complements the Matchbox Revell AVRE Bridge Layer. I like the fact that this is a non-fighting specialist AFV. One for the bucket list done!