I use my minor all the time with boro............ but nothing too enormous I must admit.
I am running mine on an 8LPM oxycon and if I want to work something larger than say a 1.5inch marble then I find its better to crank it up to squeeze out the extra heat.
I tried making some complex murrini in boro once............. I had RSI of the arms after trying to adequately melt the large gather for over 3 hours (Yep I was stubborn), so if you want to do larger work then you will need to upgrade. I have just bought a Phantom so I can up the ante on my boro work, but the minor is fine for regular sized beads and small sculptures.
Nat