After trying a few different ones out, this is the one I stuck with.
Nite Ize Wraptor, Rotating Smartphone Bar Mount, Grey https://www.amazon.com/dp/B078L18FTZ/ref=cm_sw_r_apan_i_F8X116QVQ85BH045BBHP?_encoding=UTF8&psc=1
Quad Lock is def the absolute best.
On the less obtrusive side, I have this one and it's been excellent so far. Generally the more moving pieces the worse they are. Stay away from plastic clips and the like.
It's going to be tight no matter what you use.
I, too, moved my mount from my previous bike, but ultimately decided I just didn't dig it.
I ordered this, and have been using it about a week, and it's infinitely better imo.
Nite Ize Wraptor, Rotating Smartphone Bar Mount, Grey https://www.amazon.com/dp/B078L18FTZ/ref=cm_sw_r_apan_glt_i_TCQ5E4KVMKRGKSERX7SA?_encoding=UTF8&psc=1
I didn’t want to have a magnetic case or anything, so I bought this cheap mount and it works absolutely perfect.
I have had this mount for my iphone in my truck for about 2 years and have been very happy with it. I am ordering this mount by the same manufacturer to attach to the H-rail on my hobie outback.