My Blacktip came with the tow rope; I don't know if they are still shipping with them but hopefully so. It's a nice nylon rope. Some leave the bolt snap free running, some fix it with either a Lark's head knot or tie the snap to the line with cave line (that's what my instructor did for me and how I have it - it's adjustable but stays generally where you put it). I actually replaced the rope on mine to be blue and used a 3/8" nylon rope I bought on Amazon. Be careful with customizing, you can get carried away like a 20 year old with an old Honda Civic.
I had a nylon rope on the nose with a big boltsnap (courtesy of
@geoff w ), but I ended up replacing it with a braided paracord lanyard just for looks. I also had a friend help me make a Suex-style handle for the tube instead of the one that came with the tech tube. I put my hand through that handle underwater to sort of park the scooter next to me or to maneuver it sometimes, but I don't use it much on land since the plastic handle on top of the tube is pretty convenient for that.
I got one of the T-handles from
@Patrick Sadowski (he's on the FB group for Dive Xtras) and that has been my most beloved upgrade so far. It makes the scooter easy to drive with either hand. I also vinyl-wrapped it just for fun. (I guess that's the carbon-fiber hood of my Honda Civic, LOL). I got new grips (130 mm wide versus the stock 90 mm at Patrick's recommendation) when I got the T-handle and went with the blue theme. I have the Kayak compass mounted with some bungee toward the bottom of the tube, but I honestly don't use it a lot. I don't do lots of compass nav while scooting, mostly visual nav at this point. There was some concern with deflection of the compass but in my limited use it seems to be ok.
I have 2 of the 12 ah batteries and a 2 bay charger. I haven't come close to depleting them on a dive day yet. I would start there, and see what your usage is, before considering a 2nd set.
If you get a chance, I would order a spare set of O rings and a spare handle body from Dive Xtras just to have at home. The handle bodies were out of stock for a long time and they recently came back into stock. They are only $14 or something so it's worth having around because that does seem to be a part that could break.
I have several friends with much more expensive scooters, and I am very happy with my Blacktip. It keeps up and I don't feel any regrets at not having the premium option. I was even able to understand how to upgrade the Firmware after some tips from Geoff (who actually did the first upgrade FOR me), and I disabled safe start, which makes the scooter more usable in heavy current. It is cool that you can customize certain options. Dive Xtras has a video on their Youtube page where Jake walks you through upgrading / playing with the firmware. All you need is a USB extension cable.
Congrats on your Blacktip! I was a bit scooter-wary at first but it has been a really useful and fun tool so far.
PS, thanks to
@Compressor for teaching me that you can just drag and drop photos to posts. I've been putting them on Imgur and going through this multi-step process for no reason!