Hi Piero,
sorry for late reply because of my internet server had some proble[

]ms
ok now your questions '' I am wondering about the total quality of the composite workmanship. Does the quality like French kits (Lazulite, Synergy,etc.) or the Chinesee kits (impact, revolution pro,etc.) ''
- As I can see both european & chinesee kits ( one of my friend have lazulite & revolution pro) ; IMPULSE is an example of top euroepan quality kits ( honestly its not a kit , its ARC almost ready to cover plane with all accessories ).. you only need covering metarial (monokote or oracover films) + paint for fusalage

... For painting I did not need any special sanding or etc. directly paint..fusalage have no pin holes or etc. it looks and shines like a marble..
'' I dont have budget to spend 3000 Euro for the kit. Please send me your feedback. ''
- I check some european comapnies and they have basic kit prices around 800 euros and like my impulse ( wings & stab balsa sheeted + leading edge balsa + aileron cuts etc. ) they call luxery kit and prices goes up to 1500 - 1800 euros WITHOUT accessories such as hydemounts, wing&stab adjusters,elevator bellcrank etc. .... so this arc plane is very cheap if you compare with them and similar quality...
''Also I saw on the impulse web page a dual bell-crank system, how is it working? Like MK or something else.''
- The bell-crak system have like MK but dual ball bearings and its much precise without any free play !!!
You can see 2 impulse & 1 cocain together to comapre the sizes...
Happy landings
Oscar