OK, so I’m ignorant. Let’s get that out of the way. Now for my question:
Do you have to have blocks on the chanter if you want to mount keys?
In other words, if you buy a chanter with no blocks, are you forever doomed to crossfingering or is there some genius out there who has figured out a way to add keys without having blocks?
From a very ignorant person, the answer is no, you do not need blocks. Some pipemakers will use posts to mount keys, similar to other orchestral instruments like clarinets, etc.
djm
Brian Howard and Andreas Rogge use pin mounts. Probably others, too.
Depends on whether the wall of the chanter is thick enough to take the posts that support the keys.
Does anyone have any images of keyed chanters with posts rather than blocks?
Why the research? Do you have a great keyless chanter that you want to add keys to?
Brian Howard and Andreas Rogge use pin mounts. Probably others, too.
Arie De Keyser too.
Are there some Crowley sets out there with pin mounted regs.
Tommy
Go fish! 
djm
…allow me. :roll:
A Howard Chanter with pin mounts.
A Rogge regulator with pin mounts:
Hmmm.
Looks pretty but not very solid. Are there any particular advantages or disadvantages of this type of keyed chanter?
PJ, they probably cost more. As C Bayley noted, the thickness of the chanter walls would be a factor in how strong/stable they would be.
Joe, what you bin smokin’, son? 
djm
They are actually quite sturdy, wooden and metal flutes have used this design for centuries. Plus, the wood mounts (IMHO) break alot easier than pin mountings. The shrinking and expanding wood goes through during seasonal changes can affect the key’s functioning.
I’ve been samplin’ that stack of 'rundo behind me. Look…I can catch my hand!
Yee Haw! No-one can say you don’t have the nyah … or is that hiccups?
djm
…uh…heh…gas. 
Andreas Rogge does not use pin mounts as standard on his chanters(which was the question) but block mounts.He uses Pin mounts on the regulators.Although ye can have block mounts if ye wish.
Contrary to what ye think pin mounts are stronger than block mounted as the tolerance between wood and the locating pin for the key is quite thin and accidents can happen I had an eejit spill beer over my regs,the liquid got into the grain and split the wood luckily I was able to superglue it back so it is now stronger than originally.Ye don’t have that problem with pin mounts as it is metal to metal.
Uilliam
He is looking to add on pin-mounted keys to a chanter. Both Andreas and Brian could do it if they chose to. Whether or not they would interrupt their standard manufacturing operation to do so would be up to them. What they charged would be up to them, too. So, no guarantee that they would attempt the work or what the charge would be.
Who Andreas? I don’t think so… anyhow he put a pin mounted F key on a C# chanter o his for me as there wasnae block for it ,it already had a C key block mounted on it and the two look fine together.