hi mate,
thanks for the extensive reply, that really helps!
the thing is, i dont actually “need” a mixer and soundcard in one, as i mix in the box. but there is literally not one soundcard on the market, that has more than 10 inputs, standard from the factory. most have 8, which you can extend with adat. or maybe 10, and adat.
there is one soundcard from ESI that has 16 jack inputs, but well…thats ESI. not really super build. google: esi_u168_xt (i cant post links here apparently.
im leaning towards the new steinberg ur816c, but again, that one has 8 ins. and i need 8, so i will be full again 
right now i have the ur44, 6 ins.
1 for my sub37
1 for my tr8s
2 for my blofeld
2 for my prophet rev2
2 for my nordlead 1 keys
i cheat, as i have my nordlead now plugged into the “external in” of my tr8s. in mono. works fine, but still.
anyways, im drifting off 
the thing is, i want all my gear to work simultaneously, but i never record them all together. or use them all together live. so basically, i could do with a nice analog mixer. with 16 ins or more.
the only thing i cant get to work in my head, is that i than dont have all gear as “external instruments” in cubase. and that just feels sooooo nice. u can use them like u would use a vst.
could you please let me know, is this possible with the soundcraft?
so, lets say channel 1 and 2 are my blofeld, on the soundcraft. 1 left, 2 right. can i make an “external instrument” out of those 2 channels / my blofeld, just lilke in the current situation? or does it only “see” the whole mixer, as “one thing” coming into cubase? hope i make sense 
so yeah: if i wouldnt had to think about 700 euros moneywise (which is a lot for me, these corona days) i would buy the soundcraft. instantly.
but maybe its time for me to do some meditation, and focus my brain on a simple mixer. maybe even the soundcraft
but than without MTK.
i never record multiple machines at once, so i might just need to go for a normal mixer, with a stereo out going into my UR44.
end of rant
any thoughts welcome.