Lake, I see above the D-C-B-A engine sequence, and that the apogee is below 800 ft. as you're wrote you're trying for. So good. But, if the true goal is "keep it low", with 800 ft. as a maximum allowed (and that's truly an "if") one could go something like D-A-A-½A. That sim could be titled "You'll find it EASY."
This would be a visually interesting flight. Simulation looks good.
I agree, Joe. I'll fly this configuration.
Here's the statistics for the D12-0, A8-0, A8-0, 1/2A.3-2 Combo:
1st stage ignition: D12-0 (max Lift Weight 14 oz) Actually Lifting 10.2 ounces (1.37 : 1 Ratio)
Max Speed: 79 mph at end of burn @ 121 feet altitude
2nd stage ignition: A8-0 (max Lift Weight 3 oz) Actually Lifting 8.48 ounces (0.35 : 1 Ratio)
Max Speed: 78.9 mph, Slows to 70.03 mph at end of burn @ 203 feet altitude
3rd stage ignition: A8-0 (max Lift Weight 3 oz) Actual Lifting 7.59 ounces (0.39 : 1 Ratio)
Max Speed: 69.9 mph, Slows to 68.2 mph at end of burn @ 279 feet altitude
4th stage ignition: 1/2A3-2 (max Lift Weight 2 oz) Actual Lifting 6.69 ounces (0.30 : 1 Ratio)
Max Speed: 68.2 mph, Slows to 0 mph at Apogee of 457 feet