I just bought a pair of 250ti that are in good condition overall. However, one of the speaker binding posts is loose (probably due to over tightening with a nut driver tool). I am guessing that the nut on the rear of the binding post needs to be tightened. To do this I need to get access to the internal facing of the speaker back panel. What is the easiest way to get access-- taking the speaker back panel off (it appears to be held in place with screws) or do I need to pull the woofer?