Rodger

Maybe try saving the craft with a new name after swapping? And make sure there's no other depreciated parts remaining - it's not just the engines.

Modding comes down to motivation. If RTB (or anyone) isn't feeling it (for whatever reason), thats just how it is. RTBs reasons for demotivation certainly make sense to me. And maybe if the situation changes that will be enough to remotivate, but I'm not sure telling him he's not thinking straight will help much.

I just launched it manually in 2.6666x (jnsq scale, 1,600km kerbin radius) too, and had 322m/s left in the 2nd stage even having overshot the 100x100 orbit. Are you using some other mod that changes fuel types or something? Also make sure KSPCF is up to date if you're using that.

My first guess for weird issues like this is the old version of TweakScale. If you have it, try replacing it and all of it's associated mods like Recall/Companion with TweakScale Rescaled instead. Otherwise if you post your ksp.log I can have a quick look, but if you have old TS, that'd be my first suggestion anyway

Not experiencing that myself, either on the Mun or in 0g.

Do you have any other mods trying to apply TU to the atlas parts? Anything else applying TU to them will break resurfaced application. If you use Tweakscale Rescaled, you don't really need custom compat cfgs. The older version of Tweakscale is unsupported and not recommended.

It's just due to one of the multiple IVA mods preventing the part from being updated with the B9 subtype's data on launch. The forced-hydrogen patch is the only real workaround, the switchable fuel cells patch just is incompatible with one or more of the IVA mods. Unless they get updated with a fix. I don't even know which ones.

Found the issue, waterfall patch just wasn't updated properly. If you want to fix it yourself now just download the raw file from here (download button is top right) and replace the same file in your local installation.

Noted thanks, something to keep an eye out for when troubleshooting. But I will say BDBNIC is likely just not compatible with BDB 1.14, esp that atlas config. With Resurfaced installed you don't need that reflection config anyway, and all it's extra (old) models, as the new Atlas parts will already have shiny PBR textures. Any Titan configs BDBNIC ships are probably going to be pretty messed up by recent changes too. There may be some parts that have extra paintjobs that still work for now, but it'd take some careful updates for BDBNIC to work with 1.14, and I don't think BDBNIC is maintained actively anymore. May be worth recommending the user just uninstalls BDBNIC. Installing Resurfaced and Shabby 0.4 will enable shiny Atlases too if that's the reason they wanted BDBNIC in the first place.

If you've previously installed FAR and uninstalled it, there may still be a FAR config left over triggering FAR patches. Double check your gamedata for any FAR related .cfg files and remove them.

Do you have RSE?

Ah this seems like it might be a description bug, I think it's probably meant to say the ZE-3-LYC "Zeus" motor, since the real name version of the description mentions the BE-3 solid motor.

Well, there's not very many 1.875m atlas parts anymore, as they're consolidated into just a few tank parts with variants. Should just be the core/extension/conical tanks. I'd recommend VABO and CCK (with the optional CCK patch installed) to be able to find them much easier: If you are still missing parts, I'll need more details/logs.

@jacks @marxman28 If you’re using the CCK optional patch for the custom categories, make sure it’s also updated from the 1.14 download. Various optional patches also had updates

If anything none of them should be unmanned, autonomous control should come from using the “truck” descent tanks.