Vintage Air Demister Vent Modification

I'm installing a Vintage Air Mini Gen II H/C evaporator in my RCR GT40 MkI. This unit has closed off demister vents which extend higher than the three AC vents. I do not intend to use the demister vents and wonder if anyone else has cut off and capped the demister vents to prevent having to cut holes in the dash. The tech support I talked to at Vintage Air did not seem to think it would be an issue. Thanks for the help.

John Shaner
Valley, NE