Yes - that was from my posting and my images. The images linked to above look different from my system - but they don't show the actual weight that was removed so it's hard to tell. In my case, when you removed the fan, you could see the weight inside completely blocking the opening - although there is a thin space between the weight and the back of the ota that would let some air through.
Here is the weight that I removed from my 7" Meade ex-LX50 Maksutov ;-
Sorry but I have no pictures of the rear holes showing the weight still there before I started. As soon as I found the weight in the back of the OTA under the vent I went about removing it without a second thought to taking photo's of the weight still in place LOL. From memory there is about 1/4 inch of gap between the back of the weight and the inside of the rear cell casting, for air to circulate... and the black RTV Silicone which was holding the weight in took up this 1/4 inch gap, so the gap may vary from 'scope to 'scope.
Those pics are beyond words.