|Acid dissolve rate
FRME makes PSTN much more useful. With it, you can use just one piston to push whole blocks of elements. To start, draw a one pixel thick line of FRME in front of the piston. This can be up to 15 pixels wide in either direction. Now, when you push the PSTN, the entire line of FRME and everything in front of it will be pushed. When you retract the PSTN, it will all come back too.
If any single FRME can't move, the entire PSTN won't be able to move. Also, for retracting, any particle caught under the FRME will prevent the entire thing from retracting. Make sure to keep the path behind the frame clear.
There are several things you can't do with FRME. Any FRME stacked above the first layer (line) won't be counted as part of the frame (frames aren't moving solids), so you can't have it push or pull any oddly shaped FRME. Also don't attach multiple pistons to the FRME and try to retract, as they will block each other. There might be some glitches causing behavior different than described here, occasionally the FRME breaks or PSTN won't extend properly. These have mostly been fixed but if you see anything odd that does not seem intended, you should report it.
TMP: if not 0, makes the FRME "non-sticky", which means it will only push, not pull back particles with it.