The Mini-MS fuel injector controller is housed in an Hammond 1455 aluminium extruded enclosure.

The Mini-MS PCB is intended for a smaller enclosure and have the components mounted close to the edges of the board so to make it fit the Hammond enclosure, I cut a piece of PCB with the right size for the slotted case, made a cut with the same size as the Mini PCB, made some notches in the PCB where there is no components near the edge and mounted the Mini with plastic nuts and bolts after etching away the copper from the mounting frame PCB. 

After a layer of clearcoat it should sit as glued toghether and if I want to change the board to an other I can take away the bolts and cut along the Mini´s edge and change it.

This mounting frame is now exchanged for an aluminium bracket so I have something to mount the FET on and it also works as a heatsink.

The Mini-MS is designed for a AmpSeal 23-pin angeled connector, soldered to the PCB but I use a AmpSeal 35-pin connector instead with a homemade small board attached to the extra pins that I bent straight backwards . This way it should be easy to wire in more functions in the future. The board has room for 3 signal wires and 13 power wires.

Some of the pictures are from before I used the 35pin angeled AmpSeal and used a straight AmpSeal 35 and wires instead.

I have mounted a watertight DB9 in the front of the enclosure that are wired directly to the Mini-MS, this way I don´t have the DB9 connector hanging loose in a wire from the AmpSeal connector and gain some more I/O pins.

Finaly I got the MegaSquirt components kit from Glen´s Garage but now I realize that the MSPKIT (pcb, processor, MAP-sensor and drivers) are not included in the kit.

Well...on the site it clearly states: Requiers B&G MSPKIT kit so thats my foult, luckily I´m using the Mini-MS PCB that I already have so I have someting to start with.

The Stim PCB is not included either but thats a mixup made by me when i ordered the parts.

It took some time to get the kit´s from Glen´s Garage but for someone not used to building it´s worth it, just look at the pictures of the kit´s.

I am now trying to get the rest of the parts from a guy called Bill Shurvinton in England that sells MegaSquirt parts and uses PayPal for the payment.

Finally got all the part needed and started the assembly, everything went smoothly and the kit from Glen´s Garage saved a lot of time.

When putting the Mini-MS together, use the instructions from MiniMS site for step 1 to 19 and the instructions from B&G on step 20 and up. If using the original Mini-MS PCB from Mark, pay attention of the errors on the board posted on the site.

Everything worked as it should from the first power-on except for some LED´s on the stim and it was interesting and fun to "drive" the EFI with the stimulator and see the changes on the computer.

The Stimulator needed some modification to work on the Mini-MS as the pump and Fidle outputs from the Mini-MS are +12V and the stim are made for indicating a ground.

The mod on the stim are:

Change the direction (polarity) on the D1 and D4. Cut the line betveen R1 and R5 (use a small drill and turn it by hand). Cut the line betveen R7 and R6 (use a small drill and turn it by hand). Make a connection from Negative (TPS Pot) to R1 and R7. R1 and R7 should be change to higher resistans also but it works without changing.

Have the standard ver.3 in the ECU but it´s going to be exchanged with the MegasquirtnSpark-extra software to get more functions like boostcontrol, fancontrol, 12x12 VE Map, ignition control and much more.

The Board is now modified with the new connector and tested on the stim, it works.

The new aluminium bracket for the Mini-MS board has small heatsinks for the FET and voltage regulator. If the heatsink size is not enough there is room to extend them on the opposit side of the components.

After trying to make the Hammond enclosure watertight enough to go on a motorcycle I suddenly remember that I found a nice watertight case earlier so I ordered an E-Case C extruded case from Lincoln Binns UK. The new case has the same size as the Hammond so I can use the mounting bracket. It´s even high enough for the MSII upgrade board.