I have a wood burning insert that was installed in what was formerly an open hearth fireplace, venting through a 22-foot stainless steel flex liner. For reasons I'll explain below if you're truly interested, I need to access the ash dump, which is completely covered by the insert. What I'm wondering is how much "play" is in the flex liner...will it be okay to move the insert up 4-5 inches to access the ash dump without disconnecting it? Or, should I disconnect the liner from the insert first, and re-connect it later? Thanks! Backstory: the wife is extremely displeased with the aesthetics of the blower's electrical power cord being visible. I (mistakenly) mentioned that I'd probably be able to run electrical through the ash pit and install an outlet inside the firebox. I figured I'd use some 1/2 inch spacers between the floor and the insert to create some clearance for the romex (my dear spouse doesn't seem to think a 1/2 inch gap beneath the insert would look too bad... ), but I'd like some more room than that while I'm working and was hoping to lift the insert and slide some 4" concrete blocks underneath it. Hence my question about whether raising the insert by 4-5" necessitates disconnecting it first.