Yeah, I have two comments. First comment is, you may be better off having nutrient rich water coming from your tank and going to your fuge (through a filter sock preferably) via an intake T than from your return which will reduce some of your pressure. In the event that you do choose to go the return pump to fuge route, you would have more control over the flow to the display and the fuge if you had 2 valves, one to control flow rate immediately after the pump outlet, and another to control the rate of flow diversion to the fuge. I think you'll be fine either way. The advantage of one way is that you have better conditions for your fuge (at the expense of complicating your influent from your tank) while the other route may have a little less nutrients to the fuge (primarily skimmed water from your protein skimmer) will simplify the intake plumbing at the expense of effluent flow rate to the display tank. good luck, glad to have you aboard! Definitely document your progress for yourself and for others who consider something like what you plan.