Gawd that was an old link, I must have deleted that site years ago..lol.
New Link
https://www.elmod.eu/pdf/Fusion_RevB_english.pdf
I have just fitted a Fusion board. It is plug and play, apart from cutting off the HL motor plugs, trimming back the insulation and clamping them into the heavy duty plugs that they provide.
There is nothing remotely complicated about the Fusion boards, it is one board, and that includes all of the battle system electronics, all you need extra is the apple connector depending on which IR system that you use. Thomas sent me the wiring schematic so that I can make my own and have remote mounted sensors and led's around the turret.
These boards are quite simply astonishing, loud as heck, and the sound system is as good as it gets. We are talking top quality here and it shows. There are electronic gear changes, so that the tank moves off in 1st, you hear the change in revs as the gearchange is done, and the tank slows slightly, before continuing on but faster in the next gear, you simply shove the stick forwards and the board takes care of it all. Put the brakes on and you hear them squeal when it changes back down the gearbox and rolls to a stop.
Sounds are on the supplied SD card, you get the full library, plus you can download from the site. You can't play the NextGen sounds on a pc as they are encrypted, they will only play properly when on an SD card installed in the tank. To switch sound files you plug the SD card into a pc, and run the Sound Manager program, click on a tank, and its all done for you.
The tank configuration is done via a supplied USB cable. Plug one end into the board in the tank, and the other into the pc (Windows or MAC). You then get a multi tabbed system where you can analyse the battery state, amongst many other things. It tells you what your battery is, even the number of cells. Lipo, Nicad etc and the charge remaining. The Receiver Tab tells you what the transmitter is doing. Each channel shows which stick it is hooked up to, move a stick and it tells you how far you have moved it etc. This feature enabled me to see that my FlySky was programmed to use only 80% of the forward throttle and 60% of the reverse, and that I needed to reverse a channel. The Elmod starts on full up right stick, but as I only had 80% I couldn't start the tank without using all of the trim. I had to buy a new tx today to solve the problem.
The Drive tab has sliders to adjust the power to the motors, you can select the PWM for the motors so that they match the profile, the point which the tank starts to move can be matched to the engine sounds, power for spin turns (or disabling), slow turns and anything else you want to change is all there.
You can run the tank from a PC, so that you can adjust the position/revs for the gearchanges etc.
Custom profiles can be created, and simply select Save to update the tank.
Any Firmware updates can be downloaded from the Elmod site, and the Firmware can be updated on the tank using the USB. So, buy a Fusion Board and it is future proof, this has been the case with all Elmod boards, though the previous versions need sending back to get them updated.
The amp is plenty powerful, an 8ohm speaker is catered for, volume pot is included, as is a speaker plug and wire.
It's also multi channel sound, so all of the sounds can play at the same time, without losing volume on any of them, they are crystal clear.
The info is all in the manual that you can access via the link if you wish to know more.
Currently the best board out there in my humble opinion, though certainly not the cheapest.

Mine was around £140 delivered, but this will vary depending on exchange rates etc.
The Fusion Pro is identical except for the usual three servo function, rather than the single recoil servo on the Eco board, it also has additional customisable sound functions.