For sure,
SMD parts are not tolerant of PCB flexing.? Be sure when handling, mounting, placing in a vise, etc. that you you do not bow or twist the board in any way.? It should always be kept flat.? When in a vise, be especially careful of clamping hard end-to-end, as the board is being put under pressure to bow.? And when mounting in a box, make sure the case is flat and the stand-offs are all the same height.? Then be careful of plugging and unplugging connectors.? This is the one disadvantage of plastic housings -- some won't provide good support for the board.
The advantage of SMD parts is compact size and short leads so there is little parasitic capacitance or inductance, but on the other hand one needs to be careful with the board.? It's vice-versa with leaded parts and boards!
73,
Mark.
