PentaxForums new member "odgc8" posted the Exploded View Diagrams of the K20D and the *ist DL respectively some days before:-
http://www.pentaxforums.com/forums/pentax-dslr-discussion/48973-k20d-exploded-view-parts.html
http://www.pentaxforums.com/forums/pentax-dslr-discussion/48910-pentax-ist-dl-exploded-view.html
The direct links are as follows:-
[Exploded View Diagram of the K20D] [Exploded View Diagram of the *ist DL]
For those Pentaxians who are interested, just download the pdf files and have a look. And, for those who find the diagram really useful and want to do something to your cameras, I still have a typical humble advice and actually warning to you: Be *careful* and do anything at your own risk. And, YOU are the ONE who *should* and are *knowing* what you are doing!
Just in case if you have no confidence, just don't do it.
Well, when I am saying "do" this and do "that" but actually do you know "doing what" and "what" purposes are the users for doing that? ;-) I dunno, only those users themselves would know! But possibly it can be this:-
http://forum.manualfocus.org/viewtopic.php?id=11949
The above modification looks quite meaningful.. (provided that you have the *need*!)
Good luck and Happy Camera Hacking! (if you wish and dare!)