If you run on Windows, download the free version of WinISD Alpha, and learn to play with it.
Peavey drivers are very sturdy and well made.
Many are user-serviceable with replacement parts.
I find most Peavey drivers require large boxes for optimal alignments.
Yes, all can be squeezed into smaller boxes.
This is where WinISD can help you predict the outcome.
The trick to ISD is using the built-in Help function that specifies the order to enter parameters for a new driver.
If you do not follow the specific order for entering T/S data, you will tear your hair out fighting with ISD.
Once you have the driver entered in the database, you can sim as many cab designs as you have time to play.
This is much less painful than making a SWAG, building the cab, only to find out it really sucks.
When I die, I hope my wife does not sell all my toys for what I said I paid for them...