I reviewed the technical side of Bi

I reviewed the technical side of Big Boy as you asked for.Comparison to original pictures was not yet done. Checking these details will take much more time if it is being done carefully. Concerning the smoke issues: 1. Smoke stack and whistle in frontLooks good to me, released. 2. Safety valvesGood solution, released3. Gererator steamright now the steam comes out in a (projected) distance of roughly 15 mm from the exhaust. If the holes are moved as sketched, the steam will look more naturally in standstill and driving4. Front cylindersGreat solution ! released5. Rear cylindersI am not yet totally sure how the side movement of rear drive frame is made sure (although I have a strong idea).But if I got it right and the hose follows both side and vertical movement, then it is releasedPlease only explain how the movement of the long steam pipe (MSG10-2701L+R) can follow the truck6. Rear steam-off pipesno concerns, released. Sample will show how visible they will be in model. If this will ever be a problem, we could shorten them below cab floor. But only if necessary7. Power reverse front and rearLooking good to me. That will surely work. Please only explain what is necessary concerning the vertical lever of rear power reverse that we have already discussed. Is it removable/only assembled for showcase and big radius ?8. Drive principleI like the slim look of the gearboxes. Only slight concern is regarding gear noise. In actual design, motor speed is only slightly reduced before getting to worm shaft. That may cause noise with gears that are not top quality. Please make sure the gearbox is properly lubricated with grease9. Decoder position and –accessI love your solution. Customer-friendly and easy to use. Minimizes wire length and thus optimizes EMC compliance.10. SpeakersThe position of the two speakers in boiler is OK. Based on the remaining space, the speaker boxes are rather small and thus low frequencies will not come out very strong. Just in case the sound will not be as good as expected on sample test, please keep the option of a subwoofer in tender in mind. Maybe that could also be thought about as an accessory that customers could additionally order and equip if they want to get rid of their neighborhood JI guess it is loud enough, but we must check that possible issue.11. Magnetic sensor and ring magnetDecoder can only handle ONE magnetic sensor for adjusting chuff and puff. You can remove one of them including PCB. Keep the positions for assembly in design, so you can decide which one is easier to handle concerning wires.12. Front coupler imitation (MSG10-1212)What direction is the front coupler cover to be opened ? Clockwise or counter-clockwise when looking on it from above ?I guess clockwise. Can it open enough that coupler imitation can flip out enough to look real ?13. What is the electro magnet MSG10-2666 for ?14. Lights:This is the only technical issue I did not yet check in detail. I saw worklight below runboard (exact position is to be checked, but looks good), main light, number plates, marker lights (wired 3mm LED ? Does that bring out light through the 3 lenses ? – And where are they on tender ? I thought they have to be assembled rear due to American railway standards), cab light. But for my understanding, is MSG10-2149 cab fire that is visible from outside in real (because of the stoker; I saw this in a video but was not sure about the function) ?15. Tethering wireI am not sure how this is done in Big Boy. For me it looks like a step back to outdated version that needs to fumble in and pull out at the wire. We had discussed a better solution with SNCF, and some day we should also realize a customer-friendly tender coupler (mechanical and electrical). For now, I’d already be happy with the SNCF solution, but not the one we got rid of.Generally I agree to your solutions, good job! Please say compliments to the designers. The detail level is excellent and the technical solutions make me very confident