Since I replaced the multi-function knob encoder on my DS100Z with a detented one quite a while ago, I could never accomodate myself with the non-detented ones on my recently acquired MSO4000 (multi-function and logic analzyer controls). The non-detented ones are completely acceptable for those functions that emulate analog inputs (like trigger level, trace position and so on) but in my opinion an absolute no-go for for anything "digital".
So I cracked that thing open and swapped in two decent ALPS encoders (the original ones don't appear to be bad quality, it's only Rigol used the wrong type in that place). The usability is so much better now -- I don't get annoyed anymore when I've got to change the settings. Moreover, the detent function camouflages the laggy display update rate quite well. It's amazing how the human brain integrated the different sensoric perceptions. If I need to select an item three lines down, I just turn the know three detents without even having to look at the screen. And most beneficial, pressing the button doesn't affect the setting anymore.
I only hope I'll never have a defect on the device so I'ld have to swap in the original ones to validate warranty again...
Another interesting finding during disassembly: Since my scope is an MSO version and is of fairly recent manufacturing date (february 2016), it shows that Rigol continuously improves their products, see the attached photo. They took care of the rather hot-running ADCs (as reported by several contributors) by replacing the individual heat sinks with a single, big, machined heat sink that covers the whole "high temp area" of the digital signal processing path. Well done! Moreover, the photo finally shows the purpose of the high speed connector on the main board that Connor Wolf was referring to in his teardown video. This connector isn't visible in the photo but it shows that it actually intefaces to the logic analyer subassembly on the MSO models. Altogether, hardware-wise the current production DS / MSO 4000 scopes are very neat and tidy machines and I don't think they lack behind any of the "A brand" designs. The firmware may have its issues but at least Rigol is still providing updates once in a while.
Cheers,
Thomas