Several of the modified Apache wingsuits have recently come to the school. The modifications being done on the suit have been a concern for DZO's and pilots, and so each system is checked. There are several Apaches that are regularly jumped here. However, the factory modification brought up some concerns, so we asked our Master Rigger to oversee a pull test with the suit modifications.
No matter how much force, regardless of angle, we could not activate the reserve using the suit modification that uses French Maillon Rapide links attached to a thumb loop.
Please note that these pull forces are with no load on the risers.
This system can work; there are at least a couple of Apache-reserve deployements. Of the two I'm aware of, they're both UPT spectra on the reserve release.