Nice finding. Just some comments:
Floating base is not a good idea.
Only way would be to lift up the single pin of the transistor. A floating collector doesn’t matter and don’t bring any harm to the device.
This is a Transistor, therefore a floating Base (orange) is uncritical, as there will be no Base current to be amplified. But agree, this is not state-of-art engineering, more a pragmatic workaround.
Anyone still being concerned about floating Bases (orange), can tie the Base to GND (yellow)
My IR Receiver Diode mod.
With this mod, I can use the box under CE, with IR mode, include ON/OFF the box with original remote. This mod voids the warranty, use in your own risk.
The (1). I soldered an IR diode (CHQ1838** type, but others maybe good too)
in the indicated place.
– Later, due to the better signal, I did not cut the diode’s legs on the second test, but bent them in a double L shape (4).—
Before the Diode, I thinned the material of the housing from the inside with a small ball grinder (3). Thus, even under CE, the remote control works in IR mode, there is no problem like with the Bluetooth connection, there is no need to pair.
For IR mode use this remote.conf file, place your root of CE pendrive, or config folder, in CE.
frodo19, so in front of LED there is no direct hole? Just plastic has less thickness? Smart! 
Please make a new pull request here: GitHub - CoreELEC/remotes: Repository for AmRemote & Meson IR Remote Controllers
So other users easily can find it, thx.
@Betatester is currently offline because of private reasons. I will merge the PR than.
Yes, very thin… 
Not seen any hole…
Months ago when i did this IR mod ,i had to drill a small hole in front of the receiver ,otherwise it had very poor reception .
Later ,after Frodo019 did the mod and said that he only used the grinder to make the plastic thiner ,i tried it on a second mod,but it was great only without the top cover.
The top cover holds the LEDs PCB and that goes exactly on top of the IR Receiver ,which imho not only blocks the signal but also create interferences (even the mod which has the hole in front of the IR receiver is affected by the top cover ,but less).
No issue here, 4=5 m distance still good. I have dune version too with built IR, and this mod equal or better.
Maybe i got a bad receiver or the plastic is not thin enough ,but without the top cover you don’t even have to point the remote to the receiver ,so something is definitely messing with the IR.
And AFAIK ,led circuits are pretty "noisy ".
Did you use the same IR receiver Diode as Frodo19 (CHQ1838), or a similar one?
There are types with different center frequency available, which affect IR sensitivity.
Also there are types w/o metal case, which have worse EMI immunity (or lower IR sensitivity).
You may check if it’s really the LED pcb by:
I tried with VS1838b and CHQ1838 (which seem to be used on DuneHD ).
However i’m not sure if they were original or some poor clones .
I think i tried with the LEDs disconnected ,but i don’t remember the outcome.
Looks like this mod breaks wol.
WOL is because of the missing BL301 support not supported at all. Same as the USB power feature and IR remote after resume to.
Hi. Can anyone help to get my B25 remote for the Rocktek G2 working in Coreelec? Ive tried so many times and no joy. Connected an air mouse and gone into bluetooth setting in coreelec and connected to the B25 but it still does nothing. Frustrated
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