component layout helped preserve the tube based color sets

[Electronic M]

Yeah, the only time I ever saw a orange drop that was badly leaky AND cracking it was against the side of a tube on a CTC-15.

Zenith also tended to select higher quality components, and design their circuits to better tolerate leakage, etc.

Packard Bell had a similar construction to Zenith only they had upright chassis so better air flow was possible (granted the stuff at the top of the chassis would be hotter), and in combos you could hinge it open and service without calling superman in to help turn the cabinet on its side.

Setchell Carlson also had an interesting design with a modular chassis that had good ventilation...They seemed to be good reliable sets ignoring the axial 100uF 450V caps that don't last all that well compared to FP cans.