ain't done it and don't have a clue................
can you take a set of calipers to the slide in that area of the p90 and compare it to the slide of the p97??? If much of any difference shows up in width, ya probably can't do it.
can you take a set of calipers to the slide in that area of the p90 and compare it to the slide of the p97??? If much of any difference shows up in width, ya probably can't do it.