Just wanted to add my recent experience re bulk loaders.
I've been using a Kaiser brand for years (German-made),a nd it's the same stuff they sell under different brands - Adorama has the same one:
http://www.adorama.com/BLAA.html?sid=112860323467783
It works like a charm, there is absolutely no film waste (no blank frames at the end of the roll!), and has counters both for the casette and the remaining fillm on the bulk roll.
I need some more loaders (got a lot of film recently), and managed to get a Watson loader (model 100, I think).
What a piece of cr*p!!!
Pain to load and use, plastic parts keep falling apart, flimsy, counter working only intermittently, etc., etc...
The worst part of it is that the design of Watson loaders makes it absolutely impossible to avoid wasting
AT LEAST 3-4 final frames on the loaded casette - if you use the Watson loader to load film in daylight. (Well, if you're going to use it with lights off, it kinda beats the purpose, doesn't it?)
Everyone everywhere on the forums seems to mention Watson loaders as being reliable, etc.... - but my experience is totally the opposite - mainly due to the film waste as mentioned above. I mean, the design of that thing is a total disaster
🙁
My recommendation for everyone getting into bulk loading is to get the type as seen in the above Adorama link - they are being sold under different brands (Jessops and Bobinquick in the UK, also sold as "AP loader" in the US....) - the important thing is to see how it looks like, and search for that type (square, boxy, two counters, - see the Adorama site).
Both types are also shown here:
http://www.camerastore.com/dl_cat_A/-A04_bulkfilm.html
You won't regret it - if you've used Watson previously, this one is going to be a revelation!
BTW, it doesn't have any "felt traps" (AFAIK), so there's no danger of scratching film - at least I never noticed any scratches on my rolls (attributable to the loader, that is - I did have some scratches until I stopped sgueegeing wet film before hanging to dry!).
Denis