How to make a hole at the center of the membrane instead of the origin (0,0)?

[John-zzh]

Hi Tsjerk,

I'm using insane script recently to build transmembrane protein systems. when I did this: insane
-o CG_full_dimer_SOL_ions.gro -p topol.top
-hole 8 -ring
-d 0 -pbc rectangular -x 35 -y 35 -z 15
-sol W -salt 0.15
-f CG_full_dimer.pdb
-l DOPC:8 -l DOPE:1 -l DOPS:1
-dm 0.5

it just dig a hole across teh pbc, directly at the (0,0) of the XY plane. Is there anyway to dig a hole at the center of the membrane?