Mainsail Handling

I am about to get new sails. 99% sure from Doyle.
I have a Mack Pack now, and the sail always spills out the sides and needs to come down about 6 feet at a time, then stuff it in and repeat. Has anyone gone the Stack Pack route?
Any luck or ideas.
The 700+ sq. foot main on my 40/40 is a bear to handle.

I have a mack pack on my f36, also tides marine strong track. My main comes down like a freight train. It is all down except the last foot or so. I just make sure the halyard is free to run. There is a small amount of sail to be tucked in.

I had a Doyle stack pack on a prior boat that did work a little better due to having PVC tubes on sides next to the zipper.