A Hotlhead will work with soft glass but not with boro as you are most likely aware of. IMO the Cricket works well with one 5 LPM concentrator. With 2 even better.
The nice part is that if you desire to upgrade to a larger torch the Scorpion uses the Cricket as a center fire. Overall the GTT line of torches do well to conserve oxygen, that is why the suggestion. If tanked is inexpensive in your area say $18 a fill, then an oxygen conserving torch may not be necessary. Here a tank is $60 plus so concentrators become most important.
Also, check the threads in LE as there has been a lot of discussion about what torch to buy.
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