Yes, the rubber bracket is beveled backward to allow clearance from front sprocket guard for hose. check out myproformancecar.com.au. Just talked to Mat, he is trying to find me a red 90 degree hose in England. The also have the parts for conversion.Beautiful job.
I see you simply dismantled the oem water pump and used it as a plug.
When I set out to change to a E-Pump the goal was to not permanently change the various parts of the original pump. Parts are very hard to find and can be expensive. Instead I sealed off the pump using o- rings and a seal off the original pump. All parts had to be easy to get, e.g. auto accessories shops, hardware. You get the idea.I have a Davies pump that I will be putting on a VFR750 race build. Plugging the gearing for the OEM pump is a trick. There is some welch plug that should fit, but welding the original shut is a nice idea too.
From what I read, you shouldn't control the pump rpm based on temperature. Just let it work at the same speed all the time. The fancy trick is adding a switch to run the pump after you shut engine off to keep the coolant flowing on extra hot days.
If you are using an EBP15 or 25, running it at full speed makes sense. The extra power needed by the pump can be supplied by the alternator. It has a fair bit to spare.From what I read, you shouldn't control the pump rpm based on temperature. Just let it work at the same speed all the time.