If the acro goes to green on his/her own, then fine, but pushing does not make sense. Why?
Can anyone guarantee that a cat who is getting 37u or 50u or 100u shots who is pushed to green will survive if the output stops suddenly? No, you cannot.
Think of a big sink of water. On one sink, the drain plug is leaking a bit, so you have to add more water to top it up to a level needed. The leak is constant, and not much changes over time. In some cases, the leak slows and stops, but in others, the leak is a bit larger, so here and there, you make adjustments to the amount of water you need to add to that sink. There is no /faucet/tap in this sink.
Think of another big sink of water. On this sink, there is a perfectly functional drain plug, but there is a dripping faucet in this sink, so the sink is filling faster with water, not leaking. You are scooping out water, 1 cup at a time, and that may keep the level good for a few days. Then the faucet suddenly turns on to flow more water, so you are scooping even faster, then switch to scooping 4 cups at a time. It doesn't matter how much or how fast you scoop out that water because it's not going to make a difference if the water's still running from the faucet.
The above two pictures are just to show that there are two very different situations - a normal diabetic cat and an acromegalic cat with diabetes. Both sinks have plugs; both types of cats need insulin.
Where you may have problems, I say may have, is a time when the faucet shuts off and you've got a shed of 100 units of Levemir under your cat's skin.
Better safe than sorry; that's all that's meant by 'try to stay above the 100 mark'.
Sure, you can push all you want for green numbers for an acro who has not had SRT, but just be ready because acros are not predictable when it comes to their dosing needs.
You may think it's fine to say push for green when your dose is under 10u, but when you are talking 37u like my Oliver or some acros in the 50s, 80s, and 100s per shot, you tend to shy away from those greens.
Gayle