I would have thought the Roadster or even the MWDR would be great with the extended range instrument. Well, I was wrong. Sure, the Badlander is a better alternative to the extended range instrument than either of the two Dual Rectifier amps. I believe the NOS tube thread on the Roadster sort of had me poking for more investigation of the Roadster. It is a really good amp as is but now it is even better and I did need to use a soldering iron to get there.
The bad news is this was done with Mesa tubes now classified as NOS tubes. Power section was loaded with the STR440 (red bias color) and the preamp section was loaded with 1990 Mesa 12AX7 unobtanium Chinese Beijing Square foil getter tubes, aka 6N4-J military grade. V1 was an original Mesa marked tube and the rest were from Ruby tubes sold by Doug's Tubes when he had them available.
This helped to remove the swamp of sub harmonics considerably. The low-end content is still there, but it remains tight and does not drown you with lingering low end that defeats the purpose of the 7-string instrument. It was not a goal I was trying to reach, just a side effect of the change in preamp tubes and drop in bias range on the 6L6GC. It sounded really good with the 6 string, I tried it with the 7 and discovered it was amazing. The other aspect was getting to love this amp with the Standard 412 cab loaded with the V30. The Roadster was the one that did not do as well as any of the other amps. It was ok, just not what I wanted to hear. I had used a rebuilt OS recto cab I loaded with EV speakers with that amp but now I feel the Stock cab sounds much better.
If you do look for the tubes, just note that the space between the top two mica spacers will have clear glass in that area. If they are used, it will be a dark color, if they are EOL, it will be almost black and may look reflective like the getter flash. I have seem some for sale stating like new but more like EOL as the space was completely blacked out.
The bad news is this was done with Mesa tubes now classified as NOS tubes. Power section was loaded with the STR440 (red bias color) and the preamp section was loaded with 1990 Mesa 12AX7 unobtanium Chinese Beijing Square foil getter tubes, aka 6N4-J military grade. V1 was an original Mesa marked tube and the rest were from Ruby tubes sold by Doug's Tubes when he had them available.
This helped to remove the swamp of sub harmonics considerably. The low-end content is still there, but it remains tight and does not drown you with lingering low end that defeats the purpose of the 7-string instrument. It was not a goal I was trying to reach, just a side effect of the change in preamp tubes and drop in bias range on the 6L6GC. It sounded really good with the 6 string, I tried it with the 7 and discovered it was amazing. The other aspect was getting to love this amp with the Standard 412 cab loaded with the V30. The Roadster was the one that did not do as well as any of the other amps. It was ok, just not what I wanted to hear. I had used a rebuilt OS recto cab I loaded with EV speakers with that amp but now I feel the Stock cab sounds much better.
If you do look for the tubes, just note that the space between the top two mica spacers will have clear glass in that area. If they are used, it will be a dark color, if they are EOL, it will be almost black and may look reflective like the getter flash. I have seem some for sale stating like new but more like EOL as the space was completely blacked out.
You need to try it, do it now... Actually, I do not believe the Roadster would play well with the TC100 especially if you use the lo gain channel, it will be out of phase. 
