Its pretty close man, I must admit I was quite tempted to cut the soles and do one piece molds, create seams and then just glue them back. I actually hate making 2 part molds of flexible/rubber parts.
Thanks WizardBTTF. I am just working off images at this time as I don't have the shoes yet. To get these perfect, I am going to have to make new base plates and probably replace the rear inner wings. Cutting them down was interesting. I had to use the longer part from the back inner-wings to make up the length of the front parts. They are only about 1/2 to 3/4 the height of the original V2 parts. Outer wing is modded to lose some of that tail. I think I need to take more off yet.
The open back molds will give a more clear part unless your master part is perfectly smooth. As you would know, the silicone will perfectly replicate any imperfections on the surface, including finger prints. Because you are unglueing the sole off the shoe to make a new master, you end up replicating the previously glued surface, hence you recreate that texture and can never have a glass clear part. My first attempts had that issue resulting in slightly frosted side wings.
Then as you mentioned, the issue with two part molds. My first 2 part molds were simple top and base parts leaked heaps whilst I was working out what was going on. In frustration, I ended up making a bowl and plug version that prevented leaks, but was always trapping air under the top surface of the lid. I ended up adding the fill holes on the peaks of the wings and this resulted in lots of trimming and at times, a loss of details. The open back solved that provided they were slightly overfilled.
The other issue I had with those molds was either I got perfect wings and lost details on the tread, or got perfect tread and got bubbles in the wings. Open back molds just solved all those issues and gave glassy parts. But then I got feedback on the tails splitting. I don't think this is going to be an issue on the V3 soles because the outer side wing does not wrap around the back of the shoe like the V2s do. Therefore, the side wing is not required to bend as much. I noticed when mine split, it was right in line with the taper of the outer wing and I've just glued it up for now, but will remove and fill it in with grey rubber to replicate the look of the V3 and of course, the real shoe.
When I do get my shoes, I will probably mask them up, paint the outer surfaces with this new clear silicone (vario-40), let set and layer it up several times. Once that is done, peel off the mold as a U shape part. From there, I will look at dividing the parts. Definitely DO NOT want to get silicone on the fabric, so making tape and plastic bags will be 100% required.