BX1000G - did I buy the wrong product?

[Anonymous user]

My knowledge in this area is limited - while I thought I made a good call, now I am unsure if I made the right decision. Any feedback is appreciated.

Background

I have a workstation that involves a 15-inch MacBook Pro, two Thunderbolt 2 docks, two external displays, three printers/scanners, about 10 hard drives, and other misc. accessories.

I want to provide regulated power and surge protection to:
-MacBook Pro 15
-retina MacBook
-iPhone charger
-One 2TB 7200 RPM HGST Ultrastar HDD

I want to provide regulated power, surge protection, and UPS to:
-One AKiTiO Thunder2Dock (Thunderbolt dock) - this dock drives a FireWire 7200 RPM 2.5-inch HDD and a USB2 5400 RPM 2.5-inch HDD using bus power
-One 4TB 7200 RPM HGST Ultrastar HDD in a regulated G-Technology enclosure using eSATA (connected to the hub noted above)
-One SATA SSD (being powered via eSATA, connected to the hub noted above) - like most consumer SSDs, this model does not have a full PLP implementation and hence is vulnerable to issues should the power fail during a write

I chose this unit for the reviews, because I added up my numbers, and was confident that I chose more than enough battery runtime for my needs. When connected, the total load draw is under half on the battery meter, and the UPS time estimate is around 200 minutes. This tells me that the capacity/output capability is sufficient for my needs.

However,

1. I noticed there is a newer model - the BX1000M - which appears to be smaller, still regulates voltage, but is rated higher in its joules rating as far as surge protection goes. I know that the correlation between joules rating and real-world protection are not always directly related and that there are limitations to how much surge protection any unit of this type can provide. How significant are the improvements with the BX1000M compared to the BX1000G I purchased? Was it a mistake to purchase the older model?
2. Recent versions of macOS do not appear to allow one to customize the UPS settings as was the case with earlier versions of OS X. Even though the system profiler detects and UPS and shows the battery life, the power settings menu on the Mac does NOT give me any option to enable a shutdown of the MacBook Pro when the UPS hits a certain capacity (which I wish to do so that the hard drives are ejected before the UPS cuts out, if I am not home during power loss.) Is there a workaround for this?
3. I incorrectly believed that this unit was pure sine wave. In regards to the devices I wish to power, are there any concerns in using a modified sine wave unit as such?
4. When removing the labels that covered the double-sided tape on the battery, much of the double sided tape tore off, and the two batteries were no longer held firmly together because of this. I wrapped two strands of heat-resistant Gorilla Tape around the other battery casing so that the two pieces were again held tightly into place - was this OK to do?

Thanks for your time!