Ok so I've opened up the M41 for the first time and started making some changes.

First I removed the non-functioning heng long smoker unit. I just never got it to work, although it was moving air no smoke.

I want to move the speaker to in between the new taigen gearboxes, but they are still in the mail so I can't tell if it will fit. But it does appear to fit with the stock gearbox. Also now the wires are too short to reach from the speaker in the rear back to the board.

The layout and compact size of the RX18 is pretty sweet, and the wire management was surprisingly adequate (although I'm not a fan of twisted wires) I even saw a few mini cable ties in there. The overall build quality and connector fitment etc.on the board is really bad. Mine was not even closed all the way and I just barely got the plastic to snap together. It's a few steps back from the waterproof, and sealed escs that are available in other RCs.

So the reason why I want to move the speaker between the gearbox is to add some weight to the front, which I did in the source of a large square aluminum block I was using as a paper weight. I think its just the right weight, if it was steel it would probably be too heavy! After checking to make sure the upper hull would still fit and snapping off some plastic bits on the bottom to make it fit better I used gorilla glue to secure it. I didn't want to use double sided tape because it would have made it taller and possible interfere with fitment.

The motors are really small, if they didn't have that gear reduction they would be toast!

I took a picture but I don't think I can post them cause I have like 4 posts lol