Flysimware Cessna 414 Quest3 controller issue

I bought the Flysimware C414 for MSFS. I got this from the MSFS store, not direct from them. It looks fantastic using the Quest3 VR headset. But, very frustratingly, if I use either Quest controller to grip the yoke it slams either full left or full right. No control at all. If I push or pull the yoke, in VR it only moves in and out a few millimeters. Everything else seems to work fine. But without the yoke, it's unusable. I fly just using the controllers. No mouse or keyboard. All other, stock, MSFS aircraft I've tried work fine and don't have this issue. I've spent hours flying the stock C172S no problem. Anyone else seen this behaviour? I've spent the last hour sitting in the cockpit at the end of the runway, unbinding anything not strictly necessary but nothing will fix it. The only thing I haven't done is delete and reinstall it. That's next I suspect. I've also asked this on the Flysimware and MSFS Discord channels. Fingers crossed for a clue.