On Monday, I'd tried it with a Feather blade, but it hadn't actually yielded an improvement over previous shaves.
Final thoughts:
The razor is really well made. The contact surfaces of the top cap and base plates match as well as I've seen any to do so, despite being a little rounded.
I never really found the handle to be slippery unless accidentally covered with soap.
From the razors that clamp a DE blade a fair distance from the blade edge I've tried so far, the Yates with the EH plate is one of the nicest ones, both build-wise and in actual use. I reckon the latter is thanks to a neutral blade exposure and the very well matched contact surfaces being fairly wide, keeping the blade bent a decent amount.
After sending it off, I'd realised that I hadn't pitted it against the Mühle Rocca v4 and that I hadn't tried injector blade in it. The blades might've been a little too "shallow" for it, but I could've at least tried them in there.
If there'd be an OC EH plate, I would be tempted to get it for use with injector blades.
Even though the razor isn't quite for me with DE blades, it was a fun experience.
Thanks for
@Holyzeus for organising the passaround and to
@yatesprecision for the razor itself.