I am a frame builder AMA

Boiling water makes a big difference.

Noted.

Just in case any frame builders are interested, the last day for entries for the 2019 Concours de Machines competition is tomorrow (Wednesday 20th Feb).

https://www.associationartisansducycle.com/cdm2019

Theme this year is to build a bike suitable for the Paris-Brest-Paris.

See also:
http://concoursdemachines.fr/en

Edit: Checked again, and yes, dodgy link when accessed via phone or tablet, but works fine (for me at least) via laptop/pc, same in both Chrome and Firefox.

Your last link leads to a mess of popups and malware

Apologies, don't know why that's happening.
The competetion is organised by 200, a French cycling magazine, you can access the competition link through there, in French, and then choose the English version from there:
http://www.200-lemagazine.com/xxx-5/

Question for the framebuilders out there - I try to get my head around different types of tubing and strength.
All other things being equal, would a high-end tubing be more dent resistant than a entry-level one ?

Depends which other things are equal. But basically, no.

Hi end probably means thinner so worse for dents

@danstuff I was thinking same diameter, same butting, same length, same shape.
@PhilDAS: precisely my point - high-end usually means thinner tubing, but let's imagine for a second, I don't know, a frame made out of Reynolds 853 instead of "basic" steel, would the "ride quality" then be the same, but with higher dent-resistance?

No.

I was thinking same diameter, same butting, same length, same shape.

In that case, probably not. The higher end tubing is likely to be made from a better quality steel alloy but will be drawn thinner to take advantage of that, and so will if anything be more dent-prone.

If it's the same size wall thickness it's unlikely to make that much difference as there's unlikely to be much difference in the rockwell hardness of either type of steel, and that's effectively the test for dent-resistance of a material.

What dropouts are these?

http://kavikbicycle.com/?page_id=110

I think these but they don't have flat mount option on the site though they do say other options are available.

hmm but why

Why what? Modular dropouts?

I have been looking at these ones:

There is also QR and single speed

Decent idea for a versatile frame I thought. Saves you buying new wheels immediately if you're on QR but with option to future proof etc

Its so can run 135QR / 142 bolt thru / sliding singlespeed drop outs if needed.

Edit wot PhilDAS says 👌

I get the adaptability but why bother with anything else other than PMW? Do they have a USP? PMW ones risk heel rub massively on shorter stays.

Frame no 002 that I build will be single speed gravel bike with options for adding gears so may be going the modular route but may still contemplate some BB Wizardry instead

Think can also choose between flat mount and post mount dropouts. Plus Stanton use them to make their frames adaptable to both 142 and 148 boost wheels.

PMW don't have any changeable dropouts as far as I can see. And they're twice the price.

poly drops allow swapping between standards, although no chain tensioning option.

poly drops

I knew about these but couldn't see them on their site. Found now though
So 70 quid for the mounts and then 60 pound per set of dropouts, plus shipping from the US?

Ceeway sell them. Also bear frame supplies.

Also bear frame supplies.

What? Make dropouts?