Caster Cups (OK, so it's a bit long...)

[Ron Nossaman]

Roger,

>
>>Greetings Del,
>               A little tongue in cheek don't you think! you forgot the
>most important thing. the square castors, that increases the efficency of
>energy transfer, by increasing the surface area at the contact points.
>Had a great time in Banff
>Roger
>Roger Jolly
>Balwin Yamaha Piano Centres.
>Saskatoon/Regina.
>Canada.
>

Triangular casters have a bigger footprint, and eliminate one bump per
revolution when you move the piano.


 Ron