It looks good. What brand of UTH are you using? Some brands are designed to not get over 90º if you are using a self regulated one you might be able to get away with out a T-stat (it is ALWAYS recommended!! but the regulated ones usually under correct operation do not get much hotter than 10º over the room temps it is painfully imprecise but it seems to work for some) I would second Lgreys t-stat selection I suspect you will end up looking at the hydrofarms the issue they seem to have is when the probe (the part that checks the temps and allows the controller to adjust things) is not exceptionally accurate (it might read 80 but the correct temps could be something 76) With this in mind a hydrofarm IMO must be accompanied by a reasonably accurate 'set up' thermometer. With out getting too detailed (one of my tendencies) I'd highly recommend a liquid crystal type they are about as accurate as you can get on a budget. Don't stick it anywhere is it is a stick on just place it until you figure what the hydrofarm should be set on to give you the correct temps then you can remove it from the enclosure and use that to check digital ones against.