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Spot on about the ERC10. In Repaircare the consistency is pretty constant across different cure times. I usually carry the ERC10 because there are times when 4hrs is too long and the 1hr repaircare is expensive. I do carry the 1hr repaircare but only use it where I need that consistency and fast drying.
I've used a lot of the repaircare putty 'dryseal'. Masking the glass and wood and using a silicon tool to apply it. It's expensive but goes quite a long way.
I rarely use linseed putty anymore. The drying time before painting is months realistically. You can't use linseed with laminated glass either and that's a lot of what I'm doing is upgrading the glass to acoustic or security laminate. The cheap putty in a tube that I can recommend is Top Gun. Quite easy to form, drys really well. With either of those I'd recommend using a mastic wetting agent in the water, makes it much easier to get a good looking smooth bead.
I do prefer the Dryseal to Top Gun though it does come at a premium. Certainly it's easier to patch up putty with the dryseal. It blends better with old putty, shrinks less and skins for decorating really quick.
Airhead-
Most of the time I wind up puttying windows its heritage jobs for museums or listed properties and trad putty is specified by the pedants at English Heritage, no point arguing with them as you'll get nowhere. I always find it amazing how many people get grossed out when you spit on your hands before you start working with that stuff, I am also frequently amazed how many people don't feel confident using it - even galziers.
Bobbo
That's the erc10 which remains highly flexible once cured but is only recommended for 10mm deep repairs or splicing in new timber, cures in less than an hour though. The ebh60 is much more firm but takes longer to cure ~ 4hrs depending on ambient temperature and is less flexible once cured. Timbabuild also do a normal filler (called finish filler) that is good - they also do a cartridge based window putty that is much more convenient than trad linseed oil based stuff.
Didn't know about the new offering from county chemicals. Interesting though may give it a look next time in ordering from them.