I come up with weird solutions, but I would try a noise gate. Have a fast time for it to activate, and a slow time to release. When its silent, the gate blocks the noise, then when you press the note, you have a fade from the start of the note, long enough to cancel out the attack. When the note ends, the gate activates quickly - so that it's ready for the next note.

There will be other ways to do this though, I'm not familiar with Reason or synths.

Thanks for your reply.
Sounds too complicated though. There must be an easier way to do this? Anyone with Reason experience?

There should be a way to adjust the velocity. Check your manual.

Adjust the velocity you say?
Well, that did it. Thanks.

Glad you worked it out.