I mocked-up my heater over the weekend, and the template holes all line up fine. My question is this: the only thing holding the blower to the inside heater core is 6 little screws into plastic. Doesn't seem like a very sturdy setup. The instructions say to use a little Hi Temp RTV silicone on the inside to prevent air leakage. I suppose using more of the silicone, all around the air passage might add some strength to the assembly. Has anyone run into a problem with blower/core connection coming apart, and are there any suggested mods to strengthen this connection? Thanks!