Rather than photos here's a link to a page a friend put together. It's not tree-work, but SRT evolved in caves.
http://wasg.iinet.net.au/srt/srt.html
Some of the stuff (rebelays, deviations, etc) is caving specific, but the stuff on adjustment is relevant.
On the Pantin... I haven't actually used one, but I've tried all sorts of foot ascenders over the past 20 years. I only find them good for really long free-hanging ascents. Really long, like bigger than trees grow.
Gripes with foot mounted ascenders:
+ They tend to be in the way when you are not ascending, eg when you
are just walking around.
+ If you are ascending against a rock or a tree trunk, when you push
down on the foot mounted ascender it drives your body into the
rock/tree.
+ When you are starting your ascent and you don't have much rope
weight underneath you, the spot where the slack needs to be
pulled through is under your foot, not just below your waist.
+ They are another bit of stuff to get in the way during a changeover
from up/down or down/up. With a simple frog rig this changeover
should take no more than 5 seconds.
In a nutshell, once you get your SRT rig "tuned" you won't need the foot-mounted ascender...
(note that there are some things that are caving-specific in the notes. Use of non-locking biners on slings makes sense caving, but in few other situations. The locking gates end up full of mud and won't open/close. Crossing rebelays they are only clipped in for a couple of seconds and they are right in front of your face.)