I have a Petri FT EE SLR and the mirror linkage no longer works, so the mirror doesn't move out of the way and the shutter speeds are no longer snappy. It did have problems with the mirror staying stuck in the up position after taking a shot. Replacing the mirror bumper solved it but it would occasionally still stick with speeds under 1/60, which seems to be a common problem with this model. Does anyone know of a camera repair shop or someone that could repair this? I am the original owner of this camera and it was my budget camera when I was a teenager and it would be a shame to use it as a paper weight.