This is mostly a warmup for the arms and chest to get the blood pumping. I was using 15kg dumbbells for 75 reps. Then I proceed usually to like 26 kg weights for around 3 sets of 25. Then to 30 kg or 33 kg for maybe 10 to 12 reps of 3 sets. That's a full workout but yesterday I quit prematurely because the strength was not all there. Lately though I've added 37 kg dumbbell bench for up to 7 reps 3 sets. I might change the initial 15 kg sets and just start with 26 kg weights. Keep in mind when I first started I only did 10 kg and 15kg bench sets for several months because I didn't have any other weights so it became a habit. At that period I would do like 1000 reps of 10 kg bench total. 

As others have stated, you'll want to track your weight over a period of multiple weeks or even indefinitely, in tandem with macro / calorie tracking, in order to determine what your weight fluctuation actually means. One day's weight measurement isn't a meaningful result. I personally weigh myself at the same time every morning for consistency (first thing out of bed, in a fasted state), and keep a record of the daily result, calculating the 7-day average each week. I aim for around 1 lb per week (using the week's average) weight loss / gain during a cut / bulk respectively, as a general guideline - and make adjustments to the diet and training from there based on what my goals are.

Great job bro, like always. And nice videography as well. 15 years old. Sky is the limit

You folks are probably getting tired of me posting on this thread, but here is yet another recent record, this one for Rolling Thunder pullup for Lyudmila: https://ironmind.com/news/Lyudmila-Giaduchenko-Sets-Inaugural-World-Record-for-Maximum-Weight-Rolling-Thunder-Pull-up/ She is 57 years old. I had no idea.

Super cool to see another adjustable gripper out there. Did you play around with the ratings with the extensions at all? I imagine a similar attachment could be made for use with chokered grippers to extend them a bit.