Well, I had given up on a recent attempt to score another io, but HL did respond to my inquiry (8 days hence, and after the sale was over) and it's all working out great, so far.
see EDIT[I'll get the sale price on io and 2 x $80 discounts for the 2 og's I'm exchanging (both ti, one working fine, one not so well). Yesterday I posted them, with chargers, back to home base and soon I'll have io #2, for out of pocket outlay <$40.]
EDIT; HL has processed my discounts to the cart. Seems backward that they applied the sale 25% discount after the exchange credits and not before, but I'm over it already. So my outlay is a little under $80, not $40 as I had hoped. Onward.
I'm feeling pretty good about this, HL has handled this transition in a solid way, in my case and in general. It just took a while...
Other than a 2016 Grasshopper that my daughter lost(?) -- this will mean the complete turnover of my 'fleet' of 4 Grasshoppers to 2 io's. My concerns, when they announced the io as a new product, had to do with being left behind by HL.
Now, I feel that I've been given more than ample opportunity to continue on the ride with them.
btw, my current favorite use is native, with pfe and a simple 14mm female/18mm male glass adapter, it's kinda like the shortest j-hook imaginable...
I bought 2 on Amazon for 9 bucks and they came in a little zippered case! arrived next day. Crazy.
I had been using a pfe and metal drip tip, with temp setting at ~2.7 on io. Now I'm up to 3.2 with the glass adapter, still quite comfortable, for me.
If this were an og Grasshopper, those settings would be closer to about 3.7 and 4.2, respectively.