The 3iu shot may still be running longer than the peptide induced peak, which could be counter productive. Perhaps a better solution, as I agree with Stephen about the night-time pulse would be to do the 3rd 2iu gh shot post work-out.
Stephen, you really can use the whole 3hr gh pulse from the peptides without fear of muscle loss. If you dose your peptides immediatley before you do an hours cardio, you still have 2 hrs of increased fat burning from the gh whilst enjoying the anti-catabolic efects at the same time.
Your night time gh pulse has released lots of free fatty acids for energy, but you are asleep so the am cardio uses them. The dose of peptides before the cardio will peak a little while after you finish the cardio, so it will release more fatty acids, which will be used to replenish glycogen stores (gluconeogenesis?) If you feed the body, protein or otherwise, immediatley after the cardio, then the free fatty acids will be stored again, and the food will be used for energy.