Hi Guys - been off the board for a while,
I have always used a needle here - although I only use a micro-cannula in the shaft. The skin/dermis is too tight, and we are injecting into the deep dermis. Maybe some of the thinner new cannula would work - I will try that next time.
We use Voluma for the glans as well as the shaft but was considering just using Juvederm Ultra (same company, same range of fillers). Usually you would use Juve Ultra in a more superficial inject (like a lip border). It is just that we are getting good longevity with Voluma (although have not had to top up for a glans yet) so dont want to lose any longevity.