Well, you certainly seem to have embraced the low and slow concept. Those G74 and F67 numbers don't feel right to me with the projected apogee so close to the chute release setting. That said I've not used a chute release with any flights under 800 feet or so with deployment set at 300 or 400 feet. What are you trying to accomplish with those flights ? Also, as you may know, motors with average thrust greater than 80 newtons are high power motors that require a high power certification to fly. If you want to follow NAR/Tripoli rules anyway.
Since you're going to fly with DARS I think you should go ahead and sign up on the email list. That's the best way to get breaking launch info.
Good luck!