Making the Dice Roller compatible with more games

I'm rolling 3D6 and I want a success for everything but 2's and 4's rolled. This doesn't generate an error, but it doesn't work either. /roll 3d6&gt;1f2,f4 I've got a number of games that use this system. Dungeon Run <a href="http://boardgamegeek.com/boardgame/66424/dungeon-r" rel="nofollow">http://boardgamegeek.com/boardgame/66424/dungeon-r</a>... , Schlock Mercenary: Capital Offense <a href="http://boardgamegeek.com/boardgame/112462/schlock-" rel="nofollow">http://boardgamegeek.com/boardgame/112462/schlock-</a>... , and Sentinels Tactics: The Flame of Freedom <a href="http://boardgamegeek.com/boardgame/146408/sentinel" rel="nofollow">http://boardgamegeek.com/boardgame/146408/sentinel</a>... . Someone already mentioned using Map Tools because it would do it. I find that suggestion odd. I'd rather use Roll20. I've got a lot of assets here and would like to continue using them. Any chance of getting the roller app updated so this increasingly popular method of play can be emulated via the virtual tabletop? Thanks!

Not being familiar with those systems, is there a special reason that 2 and 4 are chosen over e.g. 1 and 2? Don't get me wrong - I'd be happy to see more support, but if you can get by with 3d6&gt;3 and have the same probability, it might help you in the meantime.

This system does more than just represent odds. It also tracks range in a single elegant roll for a variety of weapons based on what is omitted from the roll. It's a new way of looking at the d6 less considered. Just having the same probability doesn't cut it. Maybe watching a video of the system in play will get the point across. <a href="https://www.youtube.com/watch?v=8tGTf0tT7lw" rel="nofollow">https://www.youtube.com/watch?v=8tGTf0tT7lw</a> I've moved on to working on a game with simple dice rolling requirements.