New atari st arrived and wondering best way to add 4 megs.

[soviet]

Got an 520STFM on the mail it was quite cheap 99$ but it arrived exactly as expected wasted but working.
Purchased it to try the new "pistorm" accelerator that uses a pi on top of the CPU my other only st is an STE and don't want to risk it on experimental stuff.
The board rev is "1040 ST C103225 REV.1".

Wondering what is the best/cheap/easy 4MB memory upgrade i can get ?.
Have seen several my "favorite" one is this: https://www.ebay.com/itm/325893714057
Also is this one from exxos: https://exxosforum.co.uk/atari/last/4MBMMU/index.htm

Not sure if they could be installed on my board also if the keyboard could have enough space under it for any of them ?.
And another question is where i could find 1 gallon bottles of super glue xD.

[Zogging Hell]

If your MMU is right next to your CPU I might avoid the long one if it is going to cover the CPU as well as you may want to do a CPU accelerator at some point. Depending on whether you want to run originals or use hard disk adaptions of games might be worth considering. Originals will be happy with 512k to 1mb, so a filling of the empty ram slots on the board might be viable instead.

Of the two Exxos's one allows greater flexibility with MMU locations.

 

As for the case.. ouch! Might be worth getting familiar with plastic welding, as I don't think the super glue on its own will cut it..