Maxman1x2

If you are planning on running these on 3s for flywheel motors, the rpm will increase to around 1.33 times that of which it was on 2s rendering them too fast to be efectively used for a single stage flywheel setup. The dart will just slip on the flywheels diminishing the effectiveness of the added torque. You're looking for around 36 000 rpm as the sweet spot for medium-crush flywheel setups although you could probably run at 42 000 rpm if you're using a very high crush setup (OFP 41.5mm cage and cyclone flywheels). They will also force your battery work harder overvolted so be prepared to up your capacity or cut on longevity of a charge.
As for using them as pusher motors, it isn't really worth it as MTB honey badgers on 3s will give you a slightly higher ROF while also offering a cheaper and smaller overall package (no shell cutting and cheap to replace).
Hope i helped, if you have any more questions feel free to ask.

EDIT: i just had my xp180's burn out on me after revving them for around 2 seconds on a 3s LiPo . Don't over-volt xp180's.

That sucks that your xp180's burned out because I heard they stopped making them. RIP xp180's

Thank you for clearing that up for me

What I do for all of my Stryfes is I sand down the entire trigger mechanism with 200 grit sand paper and than just coat it in WD40 wipe off the extra grease and you're good to go!

Thanks Bubba Longshot 

Do you know what size the rubber washer is that you used?