Personally, I would not limit myself to just one brand or manufacturing source. If you want to build an arsenal, you need different reaction types and utilities - and in some cases you find a special purpose piece just at one manufacturer, or a certain ball that offers promising specs for what you have in mind with it. While you certainly can build a single brand bag, I find that this limits options and chances to learn. The vast raneg of options might be overwhelming, though, it is a trade-off.
Beyond that, I'd start arsenal building one step earlier: thinking through what you actually want and need, and how several balls can compliment each other, so that cover a wide range of conditions with as few balls as possible/necessary, and/or have reaction options which offer a different approach even if two balls overlap a bit. Sorting this out first makes ball search and choice much easier. Have a plan!
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DizzyFugu - Reporting from Germany
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