I noticed another relative, diphenyl-2-piperadylcarbinol.
That is pipradrol - did you mean the pyrrolidine derivative?
As for the desoxypipradrol, it's a weird one in the sense yjat there's no decernable physical aspect with which to judge your level of intoxication - it is all 'in your head'. From one perspective, that's ideal as it's the physical impact on the body that makes most stimulants less than ideal, but it also means that you're inclined to up the dose of desoxypipradro; until you get a physical marker to judge things with, as I found out at a friends birthday party on Sat; got really out of it and ended up consuming nearly 30mg in one night. A couple of friends who had 10mg didn't sleep 'till last night - funnily I slept OK, but I don't seem to have a 'normal' reaction to stimulants, possibly something to do with having manic-depression (not bad, just hypomanic when on an upswing, but it means that I go through moments worse than any stimulant comedown without a drug being anywhere near my body. In comparison, stimulant comedowns have never bothered me much at all).
It probably would ber smokable as the freebase, but for me, smoking is a route of last resort so I've never had any inclination to find out. I have tried IM route with 10mg and due to the lack of the physical aspect, there's no rush as such, just a rapid sense of clarity (thinking back to my first encounter with it, maybe a touch of megalomania considering I described my state as ready to march imto Poland!). I think replacing a phenyl group with a cyclohexyl would be a step in the wrong direction (just a hunch), but it might be OK with a 2-thienyl group as a replacement.
The pyrrolidine version of pipradrol diphenyl(2-pyrrolidyl)methanol is used as an optical resolving agent and is a reasonable CNS stimulant (best to use the R isomer as it's the most active) and works well at about 20mg which is a huge drop in potency compared with pipradrol (but it's still reasonably potent, so it's worth trying!). The best thing about desoxypipradrol is the total lack of anorectic activity. Quite literally you can have your cake & eat it!
A friend who produced some p-fluoro 4-MAR said that although the first time was excellent and that it had some entactogenic activity, subsequent usage became more & more troublesome so that eventually he just stopped using it altogether- that doesn't sound good to me at all.
Fencamfamine acts by causing efflux as well as inhibiting reuptake, so essentially it does have the same mechanism as amphetamine. Taking that into account and comparing the effects of N-ethylamphetamine with methamphetamine, I'd guess that the N-methyl derivative would be a more active stimulant, but that you;d have a lot more physical/peripheral CNS mediated effects as N-ethylamphetamine is a joy - it's not as potent as meth (~ on a par with amphetamine dose wise), but has less tachycardia etc than either amphet or it's big brother (personally I'd rate it the best of the simple amphetamine derivatives, but maybe that's just me!)