Demerara Distillers Limited
There used to be hundreds of distilleries in Guyana, each one with its own still. That number has gradually dwindled to just the one at Diamond, East Bank Demerara. The Diamond distillery does, however, have a number of stills, most of which used to be at other distilleries in both Demerara and Berbice. These include Albion, Port Mourant, Blairmont, Skeldon and Uitvlugt. Each still makes a different type of rum, and some or all of these are blended with each other to arrive at the finished products.
Incidentally, there are still sugar factories at Albion, Blairmont, Skeldon and Uitvlugt as well as at Rose Hall (East Canje), Wales, LBI and, of course, Diamond.
"Tiare" is an expert on Demerara rums and - if you ask her nicely - will be able to tell you which still produces which type of rum, and which of the rums are blended together to produce the various El Dorado products.
This subject has been discussed before on the forums, and you should be able to access all of these posts. Also, there is a link to Tiare's own website on the "rum gallery" webpage that you have a link to in your post.