First off I want to say that the Board texture filter called "CustomRankFlop(#)" is incorrect when asking for...
(Card) >= BETWEEN <= (Card)
...with the higher of the two cards being on the left.
So if i set the "Flop card #1 rank is in between": (Ace) >= BETWEEN <= (Ten), then what I'm saying is that the card is less than or equal to (Ace) and also less than or equal to (Ten). This makes no sense. The second "<" should face the other direction.
On top of this, When I try and use this filter option, I never get any results. The error could be due to this mistake.
Also, there is a filter for "Gutters that beat the nut str8" but a better filter I think would be "gutters that beat the nuts" so that you can filter for boards that may have many gutters to beat the nuts but 0 to beat the nut str8 (ie K95)
A filter for overall number of gutters possible would be useful as well.