TRM accounting configuration needed to switch from F111 to F110

Question

I had all TRM configuration done for working with F111. Now my customer wants to use F110 instead of F111, paying via customers instead of gl accounts. F110 was already working for FI-AP and AR.
What do I have to do in TRM customizing and master data?  I  assigned already an existing FI-AR customer to existing Financial Services/Counterparty business partner via FLBPD1 transaction. I suppose in 'Account Determination' I have to maintain 'Definition of posting specifications' and 'assignment of update types to posting specifications'. But what do I have to there? change or create additional records? In  'assignment of update types to posting specifications' should I copy the original update types, check mark the field 'payment transaction' and assign an posting spec that relates to subledger postings (posting category 2 'sub ledger posting in payment currency')?
In FTR_CREATE in tabpage payment details I check marked 'posting to customer', house bank and account id filled out, payer/payee filled with business partner number that was assigned to customer, payment method that works for FI-AP, partner bank filled out.

Answer 1

Hi thanks, I only have to create new posting specifications for the Position Posting Specifications? In the new ones I replace bank by customer?
11000     - - - - - - - - - - P O S I T I O N - - - - - - - - - - - -
11100     Position to Bank Clearing
11110     Interest Payables to Bank Clearing
11200     Bank Clearing to Position
11210     Bank Clearing to Interest Receivable
11300     Position to Position Clearing
11310     Asset Position to Position Clearing (Derivatives)
11320     Liab. Position to Position Clearing (Derivatives)
11400     Position Clearing to Position
11410     Position Clearing to Asset Position (Derivatives)
11420     Position Clearing to Liab. Position (Derivatives)
11500     Position Clearing to Bank Clearing
11600     Bank Clearing to Position Clearing