Will this seat post sold on the Rad website fit the RR6+?

 I ordered a bleed kit on Ebay for the NUTT front wheel hydraulic system on my RR6+. Unfortunately for me, I did not read the complete title as advertised as I only saw the word NUTT and skipped over the words ZERO Scooter which is what this kit is for and not a RR6+. The bleed adapters in this kit, according to the vendor, are M5x.08 mm in size. Rad Tech support says I need metric adapters measuring as M5.8 mm. The vendor says M5x.08 mm and M5.8 mm are the same sizes. I say they are not. Who is right?

In trying to increase compression on the front (left) brake lever, I turned the barrel nut to far and suddenly mineral oil was dripping on the floor and I had lost all brake lever pressure. In other words, no brake. I've been looking at various YT video's on how to bleed the system and it is pretty straight forward.  My brake lever reservoir shows NUIT Mineral oil. I'm not sure if the lever reservoir is by Tektro. Is there any way to identify who the manufacturer of the system is? I find many kits for Shimano and other systems on Amazon and just wondering if there is a specific kit for Tektro if indeed that is who my system is by.

New RR6+. The front brake lever requires more compression (movement) to engage the brake than the rear brake. Will adjusting the barrel nut increase compression (less movement of the lever) and which way should it be turned?

I recently ran across a YT video that showed a RAD5 or 6 being ridden in daylight and the headlight (not sure if it was the OEM light or not) was flashing in a strobe pattern. I have been unable to relocate that video for further info. Is there a strobe flashing feature with the stock headlight on a 6+ and if so, instructions to activate it?

I want to purchase a set of Allen sockets from Harbor Freight, but there catalogue lists both SAE and Metric sizes. Seeing that my soon to be delivered RR6+ is assembled in China, would I be correct in assuming that the Allen head bolts used in the RR6+ are Metric?

I am getting close to purchasing my first Ebike (at age 80) and have settled on the RR6+.I want to equip it with a set of bar end mirrors and like the various models offered by Hafny. Having read some posts on the subject of installation, I am confused as to whether the RR6+ will accept the Hafny bar end mirrors in reference to the internal diameter of the bar on the RR6+. Does anyone know what this diameter is and better yet, has anyone installed a set of bar end Hafny mirrors on a RR6+?

Also, do the OEM bar grips have removable end caps as I think the RR5 does have, or will I have to cut a hole in the RR6+ bar end grips?

Thanks