OK my HH gyro came today.
I tore down the sucker so I could replace my feathering shft. which was slightly bent and trace any other small culprits of vibration before installing the gyro.

My main question is:
How sensitive are gyro's to vibration? & What happens when vibration get to high for gyro?

Does anyone have a BCPP with no vibs at all? It is possible to get rid of all vibration.
I am now a master of balancing blades and flybars(been through a few sets, more than I would like to admit)
I spun up the main motor with the rotor head removed (swash plate attached) and to the eye the main shaft (new main shaft) seems perfectly strait. However there is a high frequency vibration that can be felt when touching the heli. (not from the tail it was unpluged) I can also feel the slightest bit of bend in the new mainshaft, I feel it when the shaft is turning slower and it gets very hard to notice when the motor is FT. The vibration only seems noticable at close higher throttles. So Anyways, Im sure that the mainshaft/gear is causing the vibs. (probably not noticable to most folks)

Has anyone tried any mainshaft/gear upgrades such as the century mainshaft/gear mod listed here: http://www.bladecprepair.com./man_cmg_conversion.html
I would be very interested to hear from anyone with this mod as I have heard of many new eflite mains being bent upon purchase. I bought one new before that wasnt even flight worthy.

also has anyone found a center hub or rotor head to cause any vibs?

I plan to re-assemble my head and rotor in stages and will report back with my findings

Please EVERYONE let me know your experiance with fixing vibs. and any eflite parts that you have found to be continuously problematic and any aftermarket parts that help?

All of us that are new to this machine would greatly appriciate it. I took me a while to realize how much better my bcpp fly when the vibs were at a minimum since at first I was just concerned with keeping the thing in the air and in one piece. It took a little bitto get in tune with the suttleties of the way the bcpp flys or should fly. (flys very stable and nice when dialed in)

Sorry everyone that I keep writing books.