Well I am on a propliner binge at the moment, I have had a Contrails DC-7C resin conversion set in the stash for a while, it is was a box heavy with resin and few instructions, it was taken down and put back up on the stash shelf many times but I bit the bullet a few weeks ago and dragged it and a Heller DC-6 kit down.
Well what a pile of crap the conversion set is, the bottom rear fuselage piece weighed a ton and looked a nightmare to fit and blend in. I didn't like the fuselage extension pieces either so I chucked that lot out and used a spare DC-6 fuselage to donate the extra length required (I had a spare fuselage from my Carvair conversion a while back). Joining the fuselage sections and fairing then all in was a bundle of fun, the conversion set's replacement fin was used (pretty average it is too.. a bit twisted and asymmetric airfoil).
Then to cut the wings and add the resin centre section..WELL! the centre section airfoil was at least 3 ml too skinny so then I added extra thickness bu laminating some plastic sheet over the top.. nah didn't like it so I made my own centre section out of plastic laminated balsa core. A lot more work is required here but first I have to do the engines and cowl and cowl fairings. Ye gods the bits do not even fit approximately! the wing fairings look like they used a sweet potato as a master. I have cut the buggers down to fit, lots of filling and refairing required. No wonder I have never seen a 1/72 DC-7C!