Need help with new TVS-AIh1688ATX-U9-32G-US RAID group for the 4 SSDs

So I installed the new NAS and am currently copying everything over from my previous NAS, 672XT. All going well. I only had 2 NVMEs to start the new installation because the other 2 were in the 672XT as a secondary volume for HDP. I cleared that on the 672XT and have added them to the 1688ATX. All good, now I have 4 2.5 SSD NVMEs, except I wanted to update the RAID from 1 to 6 now that I have 4 drives total.

It wouldn’t let me do this and now I’m ended up with a Triple Mirror for my Storage Pool 1 (System). Is there any good way to backup the Storage Pool 1 (System) and kill the RAID array and set the new disks as RAID 6 like I want? I have a drive I could insert into one of the 3.5 bays and use for a temp (System) pool while I destroy and create the RAID 6 with the 4 SSD NVMEs. Maybe snapshot the (System) pool somehow and do a move to a temp and then back? Any advice on steps to get me from here to there without breaking anything at this point? Latest QuTS Hero

Best way is via your external backup. Kill the old NAS resetup the new NAS (system pool on the NVMe or hotswappable SATA SSD) and bulk data on the HDD. Restore the data from your backup.

If you do not have a backup, take that as a hint of fate and build one.