[Omaroo (Chris Malikoff)]

In my experience, these heaters work FAR more efficiently if they are located inside the corrector flange - NOT on the outside of the tube. You don't want or need to heat all of that material on the outside in order to warm the air directly in front of the corrector plate - which is on the inside. Way too much energy is wasted. It may work, but your batteries will hate you. There's no point in heating a heat-sink! You need the warmth up front too - not behind the corrector plate.

Here are a couple I made up for my 12" LX200 and C8. In comparison to where I used to have them (outside) they just trickle along to do the same work now. The dew shields just slide over as per normal.