$85 Chicago Pickup
I have a throttle body adapter plate for meth injection for sale here. (I used the FTP Charge Pipe and AEM v2 Nozzle). This plate sits between the charge pipe and throttle body to allow for nozzles to inject meth or nitrous.
I'll throw in the BMS Meth tank I have for sale...
Also, regarding the noises. I have the MST intake and it's loud as fuck. Kind of annoying actually. It got much louder (re: worse) when I added the v2 inlet pipe a few weeks later.
If you're looking for that Fast and Furious sound, you can 100% add it for a couple hundred bucks.
I can also see pressing the button twice in quick succession. I can be a little jittery sometimes, in a hurry, not fully pressing the break pedal.
I'm actually really impressed that they were able to debug this issue. Finding the reproduction case would be painstaking.
As far as registration...
It's gonna be hard to find an honest answer in here because everyone is going to be biased with what they bought and installed. I went Swift, and I'm an incredible happy customer.
The H&R folks will likely say the same.
I'm not a tuner, but I think you'd be ok cranking it. 4psi is the max additional boost it will provide. If you're on 93 and it feels alright, it's probably ok. But without the ability to pull logs it's a little hard to know 100%. If you try it and it feels.. off, definitely dial it back down.