SO I got a bur up my nose and a beater 8x10 from jim to rebuild. The bellows is light tight but UUUUUUGGGGGGLLLLLLYYYYYY. SO I was thinking that a bellows for an 8x10 would be a chunk of money and then I thought about building one. I have been looking at sites and it seems rather straight forward but as I have learned in the past. Looks can be mighty deceiving.