Regner is perhaps the most well known German manufacturer of live steam locomotives outside Germany, using 45mm track gauge. But there are others, of which I list a few. The primary filosofie in design, is that "models should work and run". Detailing etc is nice, but secondary to operational dependability and solid construction. They will all make sure your model runs well.
WYKO A producer of larger locomotives in 1:32 with pricing comparable to Aster, but in my view better construction and running characteristics. Will deliver RTR or kits in stages according to agreement. Will also modify models, or build coal boilers to order. He speaks English.
Herrmann Echdampf He has a very god webshop that you should check out. He now also offers a steamdriven feedwater pump - but gives no list price! :-I He only delivers locomotives that have actually been testrun, and so he says are very suitable for beginners. He has got much acclaim for this Mallet https://www.echtdampfwelt.de/echtdam...eg-mallet.html
He also offers an 1:13 locomotive.
I'm very curious about his steam regulator. It seems to be designed in a new way. The screw operates indirectly on an internal valve. (Rubber ball???) It opens fully with 90 degree turn, and always closes completetely. I want to take one apart! ;-D (I would be very surprised if he doesn't speak English - it's a generation thing.)
Regner you know of http://www.regner-dampftechnik.com/
A Swiss manufacturer Dampfateliers "Am Kilometer 103,455" offers a model both 1:21 and 1:13.3 scale as well. He will also fix up or modify locomotives.
DMR Reppingen His "website" is a disaster unfortunately. I guess he gets all the business he wants anyway ;-D He also offers coal fired engines, and a nice locomotive in 1:13,3 for 45mm gauge. Kits or ready to run. I've bought parts from him, of which a lot weren't listed, which maybee explains his website., His service was more than excellent. He will fix up or modify any locomotive. If he communicates in English, I do not know. I have a feeling not.
I have to mention Dieter Knupfer. He produces extremely fine screws and nuts. Like cupola M1 nuts! https://knupfer.info/shop/index.php/...205-ms-10.html
I just couldn't help myself buying 25 of the irresistable gems. I've only used two so far, but I sometimes just pick them out of storage, and look at them with almost teary eyes. I know I'm nuts, but I'm sure there are other nutters out there who can understand me. ;-D
For fastening some parts on models, these "semi fake" screws are nice. https://knupfer.info/shop/index.php/...tehbolzen.html
I don't know the English term for "Stehbolzen". In Swedish I wouId call them "pin-bolts". Only these have fixed nuts to them. In live steam, Dieter is into 5" and tracksystem.