With the exception of vials that are 100mcg a piece, no you do not want to reconstitute with bac water. The life of the igf in bac water will be day at best. You want to use acetice acid .6%. Now you can make this your self but I would advise you to get it from a respectable research vendor.
As to the sting of AA yes it stings. To reduce, and IMO eliminate, any pain after the igf/AA is drawn into your pin you could then pull some bac water into it. THis should not be left for any time and should be used right away to avoid having the peptide degrade.
Just be sure and do all your homework with regards to how to use it so it is effective for you. What T.C. was correct, believe me it works you just have to know how to use it to make it work for you. Good luck meanmugger.
I worked with a IFBB Pro who is also a biochemist. He found in the last 2 months that all the AA literature was false. They did a accual test in a lab and found that Lr3 was stable in NaOH water for 20 days.