Good decision man. I was going to comment but since your question was addressed to Shannon I preferred not to. But yeap that was an excellent decision. Many (just like you) are tempted to use other subs as a crutch to get them by in their alpha journey. Indeed the first few stages(or the first run through) could be very stressful which makes you look for alternative solutions just to be able to put a band aid on certain circumstances your facing. Alpha is one heck of a sub compared to 4G single stage subs. I'm currently doing BIATBW and I can say my mind is working a lot lesser compared to when I was doing Alpha.
365 Days of Success and Luck