I hear what you are saying. There is a good sized blob in there but its honestly not that big plus its drying from both sides and the center. I'm really not concerned about it, and the RTV isn't going to deteriorate.
I have the Right Stuff here as well, we used to use it to glue all kinds of parts on turbo Apex projects, things like 1/2 moon seals etc, gluing on the intercoolers yada yada. Fundamentally its not a ton different than RTV but I believe it has more adhesion. It is a good product, it sticks like $hit to fur.
The issue with building the heated bars is getting whatever product in there in the first place. There's no way to easily stuff it in through the center hole. You really need to be able to inject it without fouling up the threads for your blocker plug because once the bars are full you have no room to re-tap the threads for the plug. I'm not sure if The Right Stuff comes in a small tube I buy it in a large tube that goes in a caulking gun so, no go on injection into the bars.
I guess we will find out here in a couple of weeks how it all works out. I wouldn't add the RTV or any non catalyzed product bolt it up and go riding though without giving it a good long drying period.
I spent under $50 for all the parts including valves so it is cost effective, and it takes about 3 hours start to finish, bit less now that I have it all figured out.
M5