Manually generate seeds for Trezor T

Is it possible to manually create a seed from the English BIP 39 word list and enter them into the Trezor Model T recovery to create a portfolio from these words? I know that choosing the 12 words does not work because the last word is a checksum from the previous 11. Is there a way to determine the 12th word among the first 11?

Mutlisig transactions with trezor with multiple inputs and outputs that can not transmit

I'm trying to do a multisig

here is my last hex

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 69a6a6051412b72ec739886e265c6dd8a7210210bcb0788c50f89122ff912bce2dec291aa41ed22a7f447c1a8f638cbf0d9d5d2102842d33deb2139b78260bcd3e0962c28963c3f08a6a378a4f4eb9e1d352447edb53aeffffffff02a08601000000000017a9148624340a6f5cd0117bcd237af85f7ef303257d0a87a08601000000000017a9148624340a6f5cd0117bcd237af85f7ef303257d0a8700000000

and here is the script I'm using

https://pastebin.com/Nvcui563

error I get during the broadcast

Error while validating the transaction: Error while running the script for the input 1 referencing ac560e33ef8005359fc84544edaab46a42fe65e2bd4b3461bd4cec19bf5a0c8d to 0: the script has NOT been verified successfully.