FF/Battery pack question

I was worried that I would have to add a switch to the battery pack - I am setting it up as an 8+2, as it appears that 10 cell holders don't exist in Portland

I couldn't find them in Portland either, so I did 8 + 2.  I use the 8 only if I have 1.5 volt alkaline and 10 if I have 10 - 1.25 V rechargeable.  I just attached them together with velcro tape and wired them in series with  9 v battery leads.

Well, it looks like my soldering skills work for basic wiring.  FF fired up, now I need to charge the batteries.  One step closer.