ayjay
Bluelighter
I use micron (wheel filters) all the time, mainly to boof oxy etc. I find the rush from 80-200mg of oxy fucking amazing IV.
They work a treat, and its not that hard to use, knowing for a fact most the binders dont dissolve anyway but i generally throw a 25g long tip on the end with a 3ml barrel on the other, and draw thru a cotton ball at the needle end, then repeat the first step (cotton) if there is any particulate matter in my solution i'll re-filter it with the micron (there rarely is unless im doing a heap)
btw; call this discussing price but i get my micron filters at local needle exchanges and they are usually only a dollar, and sterile water amps 50c, so its not a big loss imo. saving your veins etc.
If you regularly bang the oxys you should probably micron filter every time. There will be a shit load of particles between 1um and 50um that cotton won't get out.
Here is a link to a superb study done with MS Contins - substantially same as Oxys in terms of binders/fillers. Check out the photos of particulate matter in pill solutions.
Also great filter study from UK here - very technical but the shit as far as filtering info.