No problemo. If using UG some roids may not be very suitable but well made test when I was fat I could do a ml in my belly easily, never any pain, welts, bruises or swelling. Many old juicers refuse to try anything new though. Tip: use the detachable needle on insulin syringes instead of trying to draw with a solid insulin rig or backloading.
You can hit lean parts like delts like a normal IM, it becomes a 'shallow injection' instead of purely subq.
Also, these insulin pins for pens are too small now!