The initial seats produced from early to mid-2014 lacked
fixed press-fit threaded bolts installed in the rivet plate beneath the
seating surface. Additionally, the arrangement of the spacer sleeves
differed. Consequently, the hinges are only compatible with the new
rivet plate featuring press-fit threaded bolts. It's advisable to confirm
the type of seat or version before proceeding.

Instruction: Remove the buffers, bolts and the cover plate
Then, verify if the spacer sleeves can be loosened to reveal a press-fit
threaded bolt underneath (versions 2.0 and 3.0). V1.0 is equipped
with standard M6 bolts.
With version 1.0, large washers are still installed underneath the spacer sleeves.

Version differences Largeframe seats::

Version 3.0 (from around the start of 2017)

• Thicker upholstery
• Ventilation holes in the seat body
• Brushed stainless steel cover plate without engraved logo
• A total of 6 built-in buffers: 2 small ones at the front, 2 larger ones in the centre and 2 larger ones at the rear
• Short lock with 16 mm cylinder length

Version 2.0 (from around mid-2014 to early 2017)

• Aluminium cover plate (some with engraved logo)
• One small buffer at the front and 4 large ones at the back and in the centre
• Long lock with 40 mm cylinder length
• Repkit partially installed (black half-moon wedge and bent stainless steel plate in the tip)
• Spacer sleeves are fastened with normal M6 washers and spring washers (see photo)

Version 1.0 ( from the beginning of 2014 until approx. mid-2014)

• Aluminium cover plate (some with engraved logo)
• One small buffer at the front and 4 large ones at the back and in the centre
• Long lock with 40 mm cylinder length
• Spacer sleeves are fastened with screws and large washers (see photo)