Originally posted by Jonathan Mac People seem to spend money on the kits - I bought one (not sure from whom) and wasn't too impressed.
Since you are not sure of the source, it is hard to say whether the money was well-spent. Jon Goodman charges $10 USD for his kits with shipping included in the price. Each kit comes with extra materials, a small tool to assist in removal of the old materials (works very well), and detailed instructions. I have gone the cut-my-own route in the past and assuming I could purchase the materials in the various thicknesses and grades* for less than $10, I would hesitate to try it on the models listed by the OP due to the very narrow film door groove widths on those cameras.
The option of a full CLA was mentioned in another comment above. That usually the preferred option, particularly for bodies with mechanical horizontal-run shutters that may need adjustment and lubrication. Eric Hendrickson (high revered on this site) does a nice job on the seals in that he uses doped yarn for the film door light traps as part of his CLA.
Steve
* For example, the Super Program requires three closed-cell foam strips for the film door light traps, two thin open-cell strips to augment the hinge-side traps, a thin flocked-fabric strip for the hinge butt panel, and a single thick open-cell mirror bumper strip with cut-out for an adjustment screw.
Last edited by stevebrot; 04-01-2018 at 11:22 AM.
Reason: clarity