I'm sure having access to distillate helps (I sure don't), but your cart is going to go to shit after about half a gram anyway without a proper cut.

Carts
Yeah we are in the 3-5% range currently and see no need for any further dilution. Customers actually love how long our carts last vs others that finish up in fraction of the time. That goes a long way towards perceived value. That can be a useful marketing angle.
people use as low as 3-5% terpenes, some even report having success with less. But you aren't even touching disty, so....
Problems with separation? Check here for tips on homogenization.
Time to update your tek.