Running insulin without HGH is something you want to tread lightly with. You're not in the same category as a guy using HGH because you aren't getting the same igf 1 benefits from the combination. That's the real reason for actual muscle hyperplasia , not the insulin. Guys are going to do what they're gonna do though and with that being said, you'd be best to just use a small amount of it for nutrient shuttling. Honestly the best way is just 5 IU preworkout for pump and nutrient shuttling but if you're inexperienced then just stay with 5iu post workout.
Humulin R can have what seems like a double peak and isn't as safe as a rapid like nolvalog or humalog. To do 10iu pre and another 10iu post is too much, it'll result in insulin stacking, that's when u think you're doing 10iu post workout but it's more like 15iu from the residual in your system from the first shot. That's not smart and overboard. 45lbs in 30 days, no way it's all muscle, no way even 15 lbs of it is all muscle. Be smart