Tamron 70-300 breaks my heart

I've complained about this before, but it's really making my crazy now...

My Tamron 70-300 VC lens is razor sharp, but the auto focus and VC on/off switches are mounted flush with the lens barrel -- not on a rasied platform or bump or surrounded by a wall or fence like other lenses. They are also actuated in the direction of the lenses' optical axis, which means any time you grab the lens from its compartment in my bag, slide your hand along the barrel to grip or zoom, you are in danger of turning one or both of these switches OFF! It's happened nearly every time I use this otherwise great lens.

I just completed two senior portrait shoots and it happended again with the VC switch. I've taped the autofocus switch ON so it can't be easily moved, but the tape allows some creep, so eventually it will turn off again. The VC feature was off and I was too engrossed with directing my subjects to notice until I got back to the laptop and discovered that anything below 1/160 sec was not critcally sharp due to lens movement! I am now considering dumping this heartbreaker of a lens. Tamron's newest lenses all have these swtiches on raised platforms! They know the problem but are silent. I do this for profit and for the love of the craft, not to get pi$$ed off at gear... Tamron YOU screwed up on this seemingly minor issue that is making me hate your lens!
--

Holding a camera, any camera, reduces my blood pressure, calms my nerves, and gives me a sense of opportunity!