zepheris.hk, sorry for my slow reply.
You have three options
1. Buy BT43 and let that be your interface between BT10 and Rail. cost $84.95
2. Have us convert BT10 to BT10-NC. cost $60.00 or to BT10-LW17 (BT10-NC+ADM AD-170-S) cost $120.00
3. Sell BT10 and buy BT10-LW17 (or BT10-NC then add your lever). cost determined by re-sale market price of BT10