line up
c300 (384e) has basic panel
c500 (584e) + eco mode + cruise control buttons + more leds + bluettooth
798e - lcd top end controll panel + bluetooth + electrical actuators to control deck height and grass basket controll
recently I found full workshop manual with BASIC electrical harness wiring so I realized adding some functions should be easy
I was able solder extra buttons to stock control panel which gave me ECO MODE + CRUISE CONTROLL
Also I soldered additional led controller/relay which give me extra leds on control panel which tell me whats wrong or which function works (c300 has only "generic" warning led (1x led ) higher model has 10x leds
controll panels probably are interchangable - but not worth to paid 150euro just for two functions
BUT, full other story is 798e model - it has buttons for cutton deck and grass basket lifting - these functions are controlled by CAN (all other functions, blades on/off, eco, cruise are just wiring)
I decided to buy linear actuators and this top end controll panel to make custom setup

I remove stock stiga controler (they call it VMS) and I realized it dont have any parts for actuators control (now I am focused to only deck lifting)
so my question is:
if somehow I get 798e VMS in my hands is it possible to reverse engineering what parts missing and solder them up ?
I know this is hard and probabaly not worth it but i just wondering - probably I will go to another direction just make some arduino controller with 7 buttons to controll deck height