I've done the tests and leaving the spring connected places such a small load on the servo it isn't even worth a consideration. For me there are simply more reasons to leave the spring in place than to disconnect it. I can provide a documentation spreadsheet if requested. Before I did the tests I usually disconnected springs, the tests convinced me I was misinformed at the time.
I have seen the wear and damage that can occur to a carb where the spring is removed. Of course not all carbs are built the same and some will work fine long term if the spring is completely removed or disconnected, some not. Some carbs require the spring to center the carb butterfly in the carb bore, some do not. Simply leaving the spring in place and connected removes all doubt.
Last edited by Truckracer; 10-12-2014 at 12:00 PM.