Quick question. If the manufacturer's specs ask for clearance top and bottom when mounting in the cabinet, does that usually mean actual open space? For example, I am using Watlow Power Controllers that require 4 in. of clearance top and bottom. I have about 2 in. spacing with a 2x3 in. wireway above and below. The Watlows are probably 5-6 inches deep and the wireway is 3 in. deep. Would this affect the air flow and nullify any manufacturer warranties?