Find some old Estes C5-3's, or use Aerotech 18mm D10/13/21/24's in it. The ones I remember seeing trying to fly on C6-3's back 30 years ago were out-of-control turds due to lack of reasonable thrust-to-weight. They flew about like most other PMC's; randomly, often crashing. If all I could find is C6-3's, a Titan IIIC would be grounded.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !