It's official, the Shadow Captain project is off the ground. I just submitted my order with Fore World for a Captain Korvydae model and the Mk4 Legion Power Weapons set. Expensive!
I bought the power weapon set purely for those old-style lightning claws and the giant chain sword. You see, I really can't stand the current incarnation of lightning claws with their "brass knuckles" look. I can suffer through it on standard Marines and Terminators, but for Raven Guard, I felt they really needed the old school type, because those allow the wearer to open and close his hand. How are you going to perch on spires, climb walls, and otherwise be vertically inclined if you don't have a free hand because you have to hang onto your weapon all the time?
I thought about trying to acquire some of the claws from older GW models, like the Mk2 Veteran or something, but eBay searching turned up nothing, and I didn't want another pile of veteran models hanging around that I'd never use and couldn't sell/trade (seriously, no one wants those any more). If I had bought that set, I was going to try to get a hold of the loose claws from either of the Tartaros Terminator upgrade kits (here and here), and put one on the back of that powerfist veteran's arm. I even thought about grabbing the claws and adding them to the back of plastic powerfists, but by the time I did that, I was better off buying the already-built claws, and it would turn out cheaper!
More than likely, I'll end up reselling all the rest of the Mk4 Power Weapons kit to recover some of the costs. While the power weapons are neat, I have more than enough plastic versions to cover my needs. If you'd be seriously interested in taking the rest of the kit off my hands, leave me a comment and we can haggle about it.
The important thing is that I finally made up my mind on how to build the model. I've spent untold hours looking up possible conversions for the claws, examining possible ways to build the model by reposing plastic parts, and potential poses. In the end, I just wasn't confident enough in my current abilities at sculpting and altering models to pull off what I wanted: a nicely detailed model that I can spend some serious time painting.