Hi, can anyone help me with this problem? I would like to combine this two xshape subdivision features.together. If i drag down the upper subdivision ( non-shell part ), it will have excess parts on the below part of subdivision ( shell part ). 

How can i combine these two xShape subdivsion features together neatly ? 

I will be very appreciate If anyone can help me with these. Thank you. 

@DB Hi, sir. Would you like to help me with this problem? Thank you.