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[Mareklew]

As trays go: I have a number of small development trays, that fit about 7.5x10cm (3x4in) paper that I got for a bargain price (who does 3x4 anyway). When I disassemble things, I just stack trays with small parts in order of disassembly.  
 
As to

[Ron_g]

I use that frosted Scotch tape as well to verify focus and it was recommended to me to use a magnifying glass as well to be able to read it properly.
I have lost parts as well,I guess it goes with the territory.I use a strip of foam rubber insulation

[David_nebenzahl]

Regarding the use of Scotch tape for a focusing screen: Please get real.
 
C'mon, show you're a better tinkerer than that. If you've got what it takes to boldly tear into that camera and take it apart, you can surely take the five or ten mi

[Ron_g]

I got the tip from some pretty savvy guys there David.It works for me.Ron G

[Harryrag]

D.N. is right. Makeshift tools for a quick fix? Yes, if it seems the only solution under given circumstances. Other than that, it is low level tinkering, not on par with this forum's standards, no matter how pretty savvy those guys you mention s

[Shacksmac]

David's ground glass recipe is great - in the UK carborundum powder is the thing to use - if it is still available.
 
One further point; it is much easier to get the accurate focus on a ground glass screen if the ground surface is NOT TOO FINE. Foc

[David_nebenzahl]

Well, I disagree with you about fine vs. coarse screens--I prefer fine ones--but that's the beauty part: you can grind the screen to whatever fineness of coarseness suits you. Or grind 3 or 4 screens to match your mood. Coarse for weekdays, fine for

[Tom_cheshire]

Personally I just cut a piece of 1/32nd or 1/64th thick Plexiglas or Lexan and sandpaper one side.  Easy to make it too fine or too coarse.  
 
And, as for springs flying off to nowhere, make yourself a big clear plastic box with holes for your h

[Adrian]

The discussion on ground glass has come at the perfect time - I've got 15 sheets roughly 7x9cm, and 2mm-ish thick at work that we can't use for anything, and my thoughts fell to ground glass. I've got some wet-and-dry paper and glass cutters fro

[Glenn]

Nowt wrong in using a suitable 'Scotch' tape as a substitute for ground glass in my opinion, certainly if the only piece of genuine glass is too small etc.
 
The comments on grinding your own are interesting, especially in the light of some c

[Mareklew]

For redoing (engraved) lettering on lens fronts etc. see my thread here:  
 
This will not be lov

[David_nebenzahl]

Marek--good one. (I haven't finished reading your posting in detail yet but skimmed it and got the gist of it.)
 
Another tip: for certain kinds of engraving, it's even easier to use ordinary nail polish. I use this to fill in red dots, lines

[Mareklew]

Yep, David - nail polish will do, but I have yet to find one, that will be white, and not be semitransparent at the same time.  
 
Anyway: a bottle of cheapo nail polish is anywhere about 2? here, whereas a can of humbrol enamel - 1,60?,

[Chiccolini]

There are laquer sticks for this purpose in various colors which can be found at http://www.micro-tools.com/store/SearchByCategory.aspx?CategoryCode=PAI  (mos

[Mareklew]

Another cheap thrill, albeit seldom useful: for a scratched all-plastic focusing screen (scratched on the flat, smooth side, not on the fresnel lens side): buy a *good* protection film for electronic devices' LCD. I highly recommend the Brando Ult