Okay so the hardware is in place, the test tickets are printing.
I initially got a "Disabled by SAS - Validation not Configured" error which I resolved by changing the validation settings from SAS enhanced to SAS standard.
The BV would immediately reject printed vouchers.
After a keychip, I noticed that "No Redemption" was selected in the menu, my only option was "Bally Redemption", which I selected.
The bill validator will now accept the voucher and then think about it for about 45 seconds, but then spit it back out.
Where am I going wrong?