+1.Although you can get Keller shells with the edges done by Keller,some drum supply houses do the edges themselves to save money,with varying degrees of results.Ask where he got the shells,if he bought them with the edges pre cut.If he did them himself,I would be very concerned.It's not rocket science,but the're a lot of shoemakers out there,who think they know everything.
Un branded as well as "custom made" Keller shelled kits really don't hold any resale value,so I would also offer less money.Bonhams thermogloss maple kit had a 12x14 tom,while the rest of his wood kits,and vistalites usually had 10x14 toms,but he mixed things up occasionally.So the 10x14 tom size is NOT cast in stone ,but the 14" deep bass drum is.11x14 is just wierd,and I believe it would have to be custom made.
I also agree with the tape vs glue concerning the wrap.Tape MAY work sometimes,but most builders,and drum companies use contact cement.
Steve B