Might not be. This is to go with a 750 proform body?
View attachment 1715373126
Not that unusual.
Can extend the short slot with a razor saw or thin file, or chamfer the bottom of the throttle blade. Third option is a bit more work, but clever. Run a set screw in to shorten the slot. That was posted by someone RFS forum.
Holes to no holes will change the whole transfer slot relationship. Not saying good or bad in this case. Just that it will be like starting over as far as setup goes.