Hey Sparkee, good eye for detail you have! Yes, I committed blasphemy and used a Leatherman pocket clip on my Victorinox Spirit. (Thought I was going to be struck down by lightning for such an unholy mix, but nothing so far!)
Anyhow, if you folks don't mind me hijacking this thread, here's what I did:
Below is what I started with, a brand new Spirit and an extra Charge/Wave/Surge clip:
First I carefully machined off the head of the plier pivot rivet until it was perfectly flush. Then a #4-40 hole was drilled and tapped right down the center of the rivet. (Don't try this with a hand drill, you'll never keep the drill bit going straight and square. Put the Spirit in a good drill press vise with padding and make sure it is sitting exactly level. Drill the hole with a drill press or milling machine at low RPM's.)
Here's what it looked like at this point. The hole is about 5/16" or 8mm deep.
Then it was time to modify the Leatherman pocket clip. The two pictures below show the clip "before" and "after." Grinding off the excess wrap-around metal, then contouring and rounding the end are the obvious things to do. However, the real key to this whole project was to leave a small lip of the original metal hanging down.....
The real bane of mounting a pocket clip is to somehow keep the darn thing from moving and pivoting. On many knives I see, this is accomplished by using two or oftentimes three mounting screws. Not an option here. So I left the little "hook" of metal hanging down, then positioned the mounting hole so that the hook of metal is clamped tightly against the top edge of the Spirit.
The last step was to obtain a nice stainless button head Torx screw, which I bought from KnifeKits. It was a bit dull, so I polished the head of it up to match the finish of the pocket clip and the Spirit.
Then I put a drop of Locktite on the screw and tightened 'er up. Here's what she looks like:
Another angle.
Bob