I got my 9500 from my dad last year. It was a 180MP but it did have a Sonnet G3 400MHz upgrade in it. I added a Radeon7000 and MacPicasso860(yumm... !3D override! ) and upgraded the RAM to 704MB (interleaved).
I put in the ZIF Carrier with a B&W 350MHz G3 I had laying around, OC´d it to 413MHz and pushed the bus to 59MHz. It ran stable even with interleaved RAM! - but only with some extra cooling. I added two 80mm fans for RAM cooling, a 60mm fan to CPU heatsink and a heatsink to the RAM controller. The baby was incredible loud and didn´t fit its case. I tried a big PC case but was not able to fit all the guts inside.
I used the 9500 mainly for OS9 gaming.OSX10.3.9 did work very well but did not shut down properly.
Later I downgraded everything except the RAM and gave it back to my dad cause he needed it for work.
-got a G3MT instead -