Welcome to MOS brother.
Always know that we are serious about our answers and info finding.
If you're looking for the Goldie Lock zone of 9in by 6.5in-ish, I think most of us are chasing after that. I'm included. It's not only possible, it's a definitely. It will take discipline and dedication on your part.
Pumping commonly focuses on girth only. There is a 10% increase in length during pumping, but pumping without expressive lengthening routines under the SRT methods, you'll see very little to no length. What you expand, you must also provide lengthening support. Think about working out in the gym. If you just want to be a muscle bound titan, you will definitely get larger. But at the same time, you'll see a decrease in your height as well. Why? As you expand in muscle mass, like your penis expanding, without enforcing your height, in your penis case is your length, to remain the same or prevent compression of your bones, you'll see little to no gain on height/length and a possible loss as well.
Wrapping using flexible tape can be a chore. This is why we use TheraBand, or something similar. Don't use the ultra thick training-band (yoga bands). Whose high weights (5lbs and greater) creates more discomforts than good. Brothers here use SiliSleevs and DuroSleevs, in combo with the elastic bands you're using now to prevent slippage. The sleeve acts as an elongation tool, creating a constant traction force up to 1100g. The most optimal traction is around 1210g, or around 2.5lbs-ish. Any higher for long hour wearing will create dimishing return. This can be proven through various medical studies throughout the many decades.
Your current tool is quite nice. The only thing is, what is your true current size. It's a bit confusing. Is your current BPEL at 17.7cm or 18cm? in either case, you're around my size, and I'm working towards the optimal size that my wife wants. It has been an interesting restart of my journey for me from 5.95in length to my current 7in length within 10 months. During that time, I also work on girth, going from 4.95in to 5.75in. I like to take it nice and slow as a safety precaution. In PE, we're not chasing our dream with sprinting. We chase it as a marathon. It takes time, and we create consistent disciplines along the way.