the sus pain thing is way overstated. If you've bought tokkyyo's sus, check the lot numbers. If you have lot 124 or higher, you're fine. Earlier lots have a high alcohol content and that's responsible for the pain, but it can be substantially reduced by mixing with another oilbased injectable like EQ.
I've been using sus from lot 125 and have had no pain at all.
On the ohter hand, I've decided the drug is overrated generally. I won't bother with it again.