Wait .. you're doing 40 mg/ week of
primobolan depot right now? Why bother? If you're going to run stuff more aggressive than anavar, run it. If you try to be ultra conservative w/ the dose, you're sort of wasting your time as you've already decided to pursue an injectable steroid. ANY steroid other any anavar is going to produce many of the typically mentioned androgenic sides. "Until I see sides" is not an option. EXPECT the sides. I'd recommend 100 mg /week - can split that into 2x /week.
Primo takes 5 weeks to hit "full saturation". You'll probably love it. I'd pay attention to blood pressure and get some 1% Nizoral shampoo ASAP. Injectable primo is notorious for aggressive hairloss. Nizoral shampoo helps deal w/ DHT-related hairloss. Use it every 2-3 days like your regular shampoo. You can also use it as a body wash for AAS-related acne.
Its a nice cutter, good strength gains, I don't believe it explicitly does things like supporting connective tissue (e.g. like EQ). It is definitely androgenic. Expect the hairloss so I'd get on the Nizoral right now and run it for like a month after the cycle because the stuff stays in your system for a while (ref: detection time for primo). Also expect some voice change - this can be in the form of a scratchy / cracky voice to a voice change. It will probably be more apparent to you than to other people, but it will probably happen. I mentioned BP earlier - watch things like BP-related headaches, nose bleeds, etc. (But probably not at cycles of 150 mg/week or less). And as usual, include acidophilus (w/ any AAS or SERM / AI) to help avoid yeast infections.
Most every AAS is going to promote vascularity as you get leaner.