I think you scored. Congrats.
The SSBT mash tuns are nice, especially their newer TC versions, and the pure flow valves, despite never laying my hands on one look like a perfect solution to a simple problem.
Are you planning on using a pump or just gravity feeding back into the Digiboil? Or using your 10gal kettle somehow?
(edit: sorry i did just read you had a pump)
I ask for a couple of reasons:
Sparge. Being able to separate sparge water to slowly draw off whilst keeping an even amount of water over the grain bed is good, but not essential. This will help with efficiency/cost which was the original point of this thread.
Vorlauf (recirculating through the grain bed so when you transfer you don't end up with grain in the kettle) helps with ending up with too much protein in the kettle/fermenter, which (arguably. Lots of conflicting research) isn't great for the wort. Also, if you ever plan on using a plate chiller, it's imperative to have as little particulate as possible to stop clogging. This will also help with efficiency.
Weight. I have the 20 gal SSBT MT. Its heavy. When full of wet grain, even a 7kg grain bill, I can't (shouldn't) lift it. SSBT don't seem to post the weights of these products anywhere, but I guarantee you'll be surprised, even with the 10 gal. More than likely it contributed to your shipping cost.
I worry mainly that if you're going to have to have it up high to gravity feed it's going to be hazardous to empty. You can obviously climb a ladder/milkcrate and scoop it out manually, but that will be tiresome, and you'll probably still have to lift it down/up to clean it.
Also, as it seems this is your first foray into AG, make sure you have a plan for your spent grain. It will have maggots in 36 hours if you leave it out. Chickens don't really eat it, or at least not in the quantities you'll be producing it. Livestock will but we don't all have those handy. Compost is great but if its enclosed compost it will ferment in there so hot it'll kill your worms. You can obviously bin it but that circulates back on that you'll have maggots in 36 hours. Don't want to put you off, but something to think about.
Also if you don't have 1, get a wall socket timer so you can preheat your sparge/mash water overnight. AG brew days can be surprisingly long, and you will always need more hot water than you think. Ideally when you've finished sparging, the grain bed is still covered in water, so that might be 20L+ more than you think you'll need per batch, and sparging with a kitchen kettle is a PITA. World commercial average is 4-6L of water used per 1L of beer produced. Obviously that's not all sparging loss but it does make you think.
So fill that 65L up and get it heating.