ams511
Contributor
You used to be able to upgrade the TX40 to effectively be a TX50 just by adding the cracking adjustment knob. Not 100% positive that's true of the XTX line, but it likely is. Apeks seconds aren't really my forte, though their DS4 1st stages are used on my rEvo.
There is a guy on UK eBay that sells the knobs and ships to the US. He says you can use the knob with the ATX-40 and XTX-40. His knob is based on the old TX design without the micro adjuster. If you watch the video he adds the knob in less than 10 minutes.
---------- Post added February 25th, 2015 at 07:40 PM ----------
Def cheaper that is for sure.
This one I am keen on:
Cave Adventurers - HOG D3 w/ Zenith Sidemount Regulator Package - Marianna, Florida USA - Never Undersold!
Its sidemount.
Thanks again.
Here are some options: https://www.divegearexpress.com/sidemount/regs.shtml
Looking at the CA site they have similar packages cheaper. I would double-check with Edd about which he would recommend. I am not sure if the Hogs have reversible hoses on the second stages, I am pretty sure the Dive Rites do. To me at least the Dive Rites are better looking.