Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Doing a should swap of imperial guard shoulders with empire knight lance arms to make rough riders, what's the best way to cut them all uniformly? If it was just a handful I'd just clip them and shave them smooth but it'll be 12 arms and I want them to look uniform. I'm tempted to use a coping saw, but how fine of teeth do I need so as not to "tear" the plastic? A jewelers saw perhaps?

Jewalers saw most likely.

Average household tools probbly are not gonna be good enough for what you need.
A standard coping saw blade is made for wood, not plastic normaly.