This is my next project. I am planning it now and realize I need to purchase the FP insert (Or at least decide on one) for measurements for that. Plus shelving measurements for cable box/dvr... My questions are 1. has anyone built one of these and what gotchas do they have as far as heat and the cabinet/finish. and 2. are there standard dimensions to use for cable box/dvr stuff. I can obviously measure what I have now but it will change. The case itself should be straight forward after these two questions. The insert will be am electric plug in type that has a rating to heat 400 sqft. Thanks, John