I just got an email reply back from Don Erwin, Lynskey's Sale Manager. He generally answers all emails personally and is one of the spearheads of the exemplary Lynskey customer service.

Apparently my Helix OS was one of the last Helix OS's to be fabricated that still require a 31.6mm seatpost. All future Helix OS's and most other Lynskey's will require a 27.2mm seatpost, except for the Pro26 MTB.

Anyway, thanks for your help and I promise I will post a pic of the completed bike after I have gathered all the components and built the bike.

Frame: Helix OS Bright-brushed finish, Etched logos and name.

Fork: Enve 1.0
Handlebar: Enve Compact 44cm with black Fizik tape
Headset: Chris King Inset red
Stem: Enve 100mm

Seatpost: Lynskey Titanium / Enve 25mm setback 31.6mm diameter
Saddle: Fizik Aliante carbon braided rails black

Shifter/Brake: SRAM Red 2011 / SRAM Red Ergo 2012
BB: SRAM PF30 Enduro ceramic bearings
Crankset: Cannondale Hollowgram SISL 170mm 34/50
Front Derailleur: SRAM Red Steel Cage FD 2011 / SRAM Red Yaw FD 2012
Rear Derailleur: SRAM Red Silver RD 2011 / SRAM Red RD 2012
Cassette: Shimano DuraAce 12/25
Pedals: Speedplay Zero Stainless black
Brakes: Black eeBrakes / SRAM Red Aerolink Brakes 2012

Wheels: Custom HED C2 rims, Sapim CX-Ray, White Industries H2/H3 black hubs with ceramic bearings, 28 spokes double-cross front and 32 spokes triple-cross back, red nipples, USE titanium spinstix
Tires: Continental GP4000s 23mm tires / Vittoria Open Pave EVO CG 24mm

I have everything in hand except the Enve seatpost. The items behind the slashes are optional and are coming soon.

And, I will keep the 31.6mm seatpost even if I can not use it for my Helix OS - as Don Erwin joked, I might just have to get the Pro26 MTB so I can use the seatpost.

With Regards,

Mark