I think the LEDs will give you trouble with VC paper.

Check the bulb rating of the enlarger.
Some will take 150w bulbs, others max at 75w.
If it is getting HOT, and you have short exposure times, I think you have a bulb that is too big for the enlarger. Drop down to a lower wattage bulb, and it will run cooler.
My Durst M600 is rated for a 150w bulb, but I use a 75w bulb in it, and sometimes I which I could find a 40w photo bulb.