Just took delivery of a B-stock MS-1. Everything's good, except for one thing: all the bottom keys from F to B need more travel than the rest to trigger sound. Not exactly unusable but definitely noticeable and an immediate irritation. Anyone else had this issue or know if there's something I can do fix it? Already updated to the latest firmware.

I'm reluctant to return it because they're not easy to get hold of for a reasonable price. Also the sound completely smokes the VST emulations I have. I could learn to adjust my playing when using it but I feel like it will always annoy me.