I am not familiar with the brand but unless there is something out of the ordinary with the wheel flanges it's unlikely they cause you any problems. AC wheels are generally better to use with marklin because of better conductivity but I wouldn't worry too much unless you are having problems. Changing wheels for new ones in many wagons can make a noticeable difference price wise and you may not need to. When in doubt if I plan to buy many of something I am doubtful I just risk buying one and seeing how it performs.

Thanks Stefan

Peder

I think this most probably is the best solution you've suggested by pressing the wheels slightly inwards. I have done exchanges for some time, even from Märklin to HAG wheels,


Chris, your questions are legitimate, I just thought to get an answer quickly to contact the company direct as Stefan has supplied a website for this company.

I have some carriages with DC wheels and haven't found a problem as yet (Märklin K and C - Track)

John

I have at least one of each of the ABt/BDt models except for the Zugkraft Aargau version. I did see one on ricardo.ch this weekend, but the price was high.
If you are paying in US$, it is pretty close to the CHF right now, but for other currencies, like the CAD$, the CHF has increased by almost 20% in the past two years as it moved closer to the value of the EUR.
https://www.ricardo.ch/k...ft-aargau/v/an818158630/

The reason for these high prices is that RailTop, like LS Models and ACME, produces very limited runs of each model. I think that the maximum quantity per run might be 500 and I do not know if that includes AC and DC, or separate. This means that a production run can sell out rather quickly and the items become relatively hard to find and consequently, they attract high prices. The original price was AFAIR was 96 EUR or 129 CHF (DC) and 98,50 (AC). The Zugkraft Aargau version was commissioned by the shop Wemoba. They had a guaranteed stock quantity and the remaining inventory was available through the dealer network. The fact that RailTop ceased productions by 2008 means that there were only limited follow up production of most models. A second series of the NPZ BDt was issued with a different coach number around the same time (2007) that the version in green with the red face was released.

You would still have to convert the model to AC. You can inquire with Mr. Doll if he still has the parts to convert a DC model to AC. I believe that the slider has to be mounted on the rear bogie and wired to the appropriate terminal on the circuit board and the wires for the wheel contacts have to be unsoldered from the circuit board and then merged to the contact for a single return. AFAIK there is no difference between the circuit boards on the AC and DC versions, so no other changes would be required. The inversion of lights is accomplished by a switch that is mounted on one of the axles of the cab end bogie, which completes a connection which sets the lights for either push or pull. I am not certain which is the default and which is the activated setting. If you are swapping out the axles for AC wheel sets, you would have to make sure that the switch was properly removed and reinstalled as necessary.

The AC slider for this model is Part. 99001.

Regards

Mike C