DrDalet, I had the same timing problem you were referring to. I have seen that it can be overcome editing an existing multipad (instead of creating a new one from scratch); another advantage is that all the settings have been arranged already.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.