I just looked on the Helix website, to see what prices are these days. Standard model 10 speed derailleur is just below USD$3k. 11-36 cassette is lame, 327%, given that there is space for more. What is "Hong Kong Spec"? I do a general search online... HAH!:

467% range. Now that's more like it! That yields 24-111 gear inches. Yeah I'd replace the 42 narrow-wide ring with either a 32 narrow-wide ring for 18-85 G.I., or a 34 narrow-wide ring for 19-90 G.I. Or, leave the stock 42 ring on and put on a 10-50 cassette for 20-100 G.I.

A Helix is a lot racier than my 20" folder, so I can see folks wanting higher than 85 gear inches.