I, too, used a rotisserie. Best investment I made. Paid $700 for a used unit. Just sold it on this past month for $650. Was a no-brainer for me.
I used two wood runners, end to end, to rest body shell on, and drilled three holes in the floor on each side to bolt through to the wood runners (used a wood plate on the inside to add strength and rigidity to the mounting area). Of course, the sill members on my Plus 2 were carefully replaced before lifting the shell. That doesn't apply to the Elan, I know, but I would definitely do all the metal work on inside of shell before lifting.
Would prefer steel runners, as suggested by Kurt, to keep flexing to a minimum. But I used what I had.
Always MUCH more body work, fiberglass repairs, etc. than first anticipated, and the rotisserie is an investment that simply gets better and smarter as the weeks (months) (years) go by. And then just sell it on to recoup your costs.
I had three guys local to me cuing up to buy mine within a week of advertising.
Regards,
Randy