Hi, I want to split my private key/seed into 4 parts, and only need 2 to construct it back to original  I am thinking of using onetimepad for the encryption. My plan is to generate serval random 24 word seeds with bip 39.

A1, B1 ... is random  generatet, and A2,B2 is constructet so the equations are equal to S

I will add them word by word and use modulo 2048 if the number gets over 2048. I want to do this, so it is easy to do by hand, and so I dont need to trust on some software to do it correct. I will make serval equations and split them in different locations nr1, nr2 ... , as listet below


S=A1+A2
S=B1+B2
S=C1+C2
S=D1+D2
S=E1+E2
S=F1+F2

Nr1:A1B1C1
Nr2:A2D1E1
Nr3:B2D2F1
Nr4:C2E2F2

My questions is. Do you see some major problems with this kind of splitting? I will only add them together mannualy an enter them in to an ledger, so ofcourse I need to trust the ledger, but no other software or hardware.

Antoher question. I have read some places that is it hard to construct x1 and x2 so the checksums of those  seeds are correct, butdoes  that really matter. Will it be sigificant easier to bruteforce in a way, or make some other problems for me.

Thanks for your advises.