With the feeding during the cycle, I would give the feeds at +2 (this would help stop big drops early in the cycle that can trigger bounces) and around +5 when the insulin is the strongest. Or you could even give three small feeds at say +2 +4 and +6. If you leave the first feed til +4 the insulin is well and truly working and the BGs have probably dropped quite a bit. What you need to do is try and stop a fast or big drop that could trigger a bounce and feeding early in the cycle is one way of doing this. It can be trial and error to get the timing right but it does work.
Are you using a timed feeder?
When I say coming off the bounce (or breaking the bounce), that means that the stored glucose and regulatory hormones that Walter has dumped into his system when he thought he needed to save himself, are wearing off and he is coming back down into lower numbers. A lot of cats when they are coming off the bounce can have a big drop in numbers during that cycle. So just be aware that when he starts to drop, you may need to test more often to monitor the BGs.
If the numbers are dropping too fast you can always steer them with food.
Does that make sense?