After some time of (forced) inactivity, I have been able to get active once again and recorded a video to share a simple technique with all the other RMP-3 users.
This little trick I figured out is something I have dubbed the "Reverse Cue Scratch".

If you ever wondered how to recreate simple, short "stab"-scratches on an RMP-3 like you can do on a Pioneer CDJ, then you should check this out! I received some nice results with a variety of classic scratch sounds (the kind that you can find on hip-hop battle-vinyls for instance).
Explanation why I did this:If you are not quick on the crossfader like a DMC scratch world-champion, it can be quite hard to do clean, short scratches. Guys like me who suck a lot when attempting proper scratching, have always had the possibility to use a scratch-2-cue mode on Pioneer CDJs, that lets you scratch when you move the platter and automatically returns into cue-mode as you release the platter again. Such a mode is not available on the Reloop-deck, as the original scratch-2-cue mode on the RMP-3 Alpha has a slightly different purpose and proprietary functionality (no scratching when cued, quick return as you touch the platter - scratching in play-mode and quick return when you touch the wheel again).
This slightly different Reloop-approach is perfect for tricks like for example using the jog-wheels to do some drumming on samples, but it is everything but useful for the stab-scratching that is a popular thing to do with CDJs.
Now thanks to the simplistic "Reverse Cue Scratch" trick I found out, RMP-3 users have a way to circumvent the abscence of a Pioneer-like scratch-2-cue mode, without having to switch back to vinyl-decks. And no more jealous looks to throw at CDJ-users who can do stab-scratches with ease!

You can do faderless stab-scratches with my technique, because the activated reverse-button always gets you back to the start of the sample while the RMP is in play-mode. The trick is plain, easy and simple - but it actually works!

Try it out for yourself and you will see!
P.S.: I called it "Reverse Cue Scratch" because the reverse button is used in a way that it simulates an automatic cueing once you release the jogwheel. ^^