Yes! I too have had similar experiences with more than one panel builder is India. Many a times panel builders have objected to installing space saving devices such as MPCBs. I was told by one panel builder that normally panel builders have huge margins in Sheet Steel, Bus bars & in wiring. But, with devices like MPCBs, Combination Starters, etc. there is no sheet steel, no bus bar (as these come with reday made bus bars) & no wiring. So, they object to these devices. I am not sre how far this is true. But, this came from a panel builder himself.