You're getting some pretty good information here. Block heaters work by heating the cooling water in the block. Have seen posters from CT say they use them; others in CT don't. In VT, it was very useful for starting our old Benz parked outside there. Had a heater hose heater on it bought from JC Whitney.
My tractor starts instantly in winter here in VA. Hope they put a glow plug indicator light on the 2320s. Otherwise, you leave it in "L" or "H", turn key all the way to start, count to about 4, run lever to "N" to start.
I'm wondering why TimS switches to synthetic 5w40 oil for the winter. Why not use it year round? That "5w" at start up will still be heavier than the "40" at operating temperature but a whole lot lighter than a "15w". I worked in the lube oil industry for 31 years and am thoroughly familiar with oil viscometrics. Therefore, I use 5w40 in my current old Benz year round. In my tractor, I use 5w30 year round. Change it once/year.
Probably more important in CT would be to use a transmission/hydraulic oil heater. You can get magnetic ones, which would be better than the ones really cooking the oil internally. However, the transmission housing on modern tractors may be all aluminum and may not work. Would could probably keep them attached with some tension cords and towels. Remove when warmed up if you have to keep attached with cords and towels though. Lots of these magnetic types for sale on the internet. One poster on another one of the boards had his transmission overflow when his hydraulic oil filter blocked up on him in the cold. We even use the "low vis" hydraulic oil JD sells here in warm VA. Could just use a little electric heater sitting underneath the transmission, like I have beside my chair here.
Ralph