Using Lucite for top of preamp case cover..ok?

I have a Hovland pre amp model 100 with phono
I lost the top cover to case. I had a lucite top cover made with correct ventilation holes. The unit has 6 tubes.
Will the lucite material create any cooling problems or rf problems??...Appreciate any input
I've got the same circumstances with an Audio Horizons line stage.Not a problem and it's a real piece of eye candy,piano black.