Bernie
Here's what I use in the Club Gazelle:
iPad Bag - clips stitched on with whipping twine (very strong) & bag clips on to door lock rods & is easily accessible
Bag contains - iPad Mini, Casa kneeboard (ERSA entries, flight plan forms, paper for notes, A/C specs & speeds etc in plastic sleeves). pens, rope, electrical ties, water bottle (CASA gift & when filled clips on to door lock rods), iPad lead, oil funnel, charts (VNC etc), mini multi tool, mini first aid (bandaids, steri strips, betadene wipes, panadol etc), sunglasses, pens
Headset bag has a clip and attaches to A/C structure behind pilot's seat and is accessible in flight - contains headset, PLB, large Leatherman, spare batteries