get it and sell the wisner
if you get a verito, veritar, HUGE RR, or vesta or some crazy portrait or landscape lens
for your 8x10 and decide you want to shoot 4x5 wet plates or glass or film or paper
with this lens to save $$ on the learning curve or ... whatever,
doyou really want to deprive yourself of that ?
sure the camera is big and people here or the LF site may tell you " whats the point ?! "
the point is you want to do it ... i had a 35mm back for my 4x5 so i could shoot vintage lenses and do PC work
with small film, it was worth every 1¢ i spent on the back, ...
btw you can always buy a clunker 4x5 and screw the 4x5 back on a piece of plywood and do it on the cheap
( and keep the wisner ) if you get the urge and don't want to spend the $$ on a factory back ...