Sorry, it's a HPV Streetmachine GT (old model).
I've got one of those. Let's find some photos...
Dynamo light (then CyoR, now IQ-X) on the lower bottle cage braze-on with a standard cyo mount and a couple of penny washers. Not pictured is the Ixon IQ fork crown mount attached to the upper bottle cage braze on in the same manner. The Ixon died years ago, but I occasionally stick a cheap SMART light (they use the same bracket) on it as a backup for night rides.
Clamped to the top of the derailleur post is a stem (of unknown origin) which has a built-in accessory bar forward of the stem clamp. I've used this to mount a GPS and cycle computer. I've usefully employed the gap where the handlebars would normally go as a lip-balm holder (not pictured). I've done something similar on an ICE trike by abusing a
Thorn Accessory Bar.
This puts the GPS screen a bit further from my eyes than I'd like, but there isn't anywhere else sensible to put it. Obviously I have to lean forward (or stop) to play with the buttons.
Also visible in the picture is the official HPVelotechnik bike computer mount: This is literally just a short piece of plastic pipe with a couple of holes drilled in it, to screw to the braze-on on the boom under the derailleur post. I've used it to mount a cadence sensor.
(For completeness I should mention that there's a dedicated light mounting braze-on, along with a hole for the cable to run inside the boom, on the underside of the boom just behind the bottom bracket. This would work with a dynamo light that's happy to be mounted upside-down, which most of the StVZO-approved asymmetrical reflectors prior to the IQ-X couldn't.)
Rear lights, I've got a B&M with a nice reflector on the rack mount, which is trivial. Black Scotchlite tape on the back of the seat for stealth bling. I've also bodged half a SMART chainstay bracket onto one of the spare braze-ons at the drop-out, so I've got a second blinky light down nice and low to minimise obnoxiousness to following riders. Long pan-head screw to avoid fouling the chain, couple of spacers, cable-tie to prevent rotation.
Mudguards are bluemels with a flap that flares out on the rear. Not sure if lights can be attached, but do b you mean something like this?
https://www.velovitality.co.uk/collections/rear-lights/products/spanninga-pixeo-mudguard-light
Yeah, that (well, the dynamo version) is exactly what I used on the ICE trike. I thought they'd stopped making them.
I have a lezyne laser guide light that's got laser lines either side of the bike to mark out your own space plus up to 250 lumens light too. It's seat post mounted but it would be good to find a way to use it too.
Tricky. I think the rear rack's about the only place that's going to work for that, optically. Bodging up a bit of vertical tubing would seem like the way to do it.