I have found an rv-4 kit in my area, it is an emp, and wing kit. the emp is complete, the wing kit is clecoed together, the spar is finished, i have not seen it yet other than some pictures. The kit was bought in 99'-or 00'. He is the origional buyer/builder so he has a builder number. i guess what i am wondering is, is a builder number transferable? is there anything i need to look for in in general as far as structural stuff? has their been any changes to the spar or anything in the last 8 yrs? any advice would be appreciated, i am going to look at the kit on Sat. 16th maybe there is someone close who wouldnt mind taging along? thanks for any input, Jay