40mcg is plenty. We have to realize that this is a huge amount compared to what the body naturally produces. Maybe we can ask TheGame46 who is working on his master's degree in endocrinology what the actual amount produced by a normal human, say even with exercise, but it's probably something less than 1mcg.
20mcg each side. 30 each side in the quads. That's plenty. Now, you won't see major, immediate LBM increases, but THAT IS NOT WHAT IGF-1 IS FOR. That's what AAS are for. 40-50mcg total will let you get plenty of hyperplasia, not grow your intestines too much, and save you plenty of $. The newly added muscle cells will take months to grow, but they will, and you will use IGF-1 again because it gets reasonably inexpensive with such a protocol.
Another thing: much of the newer research shows that EOD and even E3D igf-1 treatment is better than ED because ED downregulates the receptors too quick. It takes some time for receptors to be able to come back in full after a megadose of even 20mcg of IGF-1. So you may want to think about switching to EOD lifting and IGF-1 immediately postworkout every workout, or 2on/1off and pin the lagging muscle E3D. These dosing patterns won't give you pounds of immediate muscle, but they will give you hyperplasia, which means continued growth at very decent rates, and the ability to continue treatment for a long while until response diminishes.
And no Coleman guts.