For this unfortunately you will have to you Foundry intstead, with its expander. The SEQ cv contol is on the expander, and there is a switch called SYNC SQ# which, when in top position, will sync seq changes at the end of sequences only.
There is also this setting in the main module’s menu, to determine how the SEQ# cv input behaves, and there are three options, the first two are direct control (indexing), while the last one (Trig-Incr) will make the sequencer advance to the next sequence with a trigger instead.
