| ERGO-BONE | SPINESAVER |
| Weighs 29 oz | Weighs less than 14 oz. |
Takes about one-and-one-half
minutes to put on the vest, attach
the main clamp and
adjust it to playing position | Attaches to the trombone in under
ten seconds. Adjusts to playing angle
in four to six seconds |
Performance angle changes as
the player inhales and blows with
the vest attachment
| Performance angle changes only when
readjusted because it rests on the chair
or on the belt clip attachment |
Takes about twenty seconds to
change from vest attachment to
seat-length pole - - and I am still
wearing the vest. A piece has to
be added to achieve seated length | Takes four seconds to go either from
standing to seated or seated to standing.
The belt clip attachment is already in place
and does not need to be removed or
attached to go from standing to sitting. |
Main clamp slips, no matter how
tightly I secured the fastener screw.
The posterior/anterior angle suffers
the most for consistent positioning. | Does not rely nearly as much on clamping
force to hold the adjustment so, once
adjusted, it does not slip. |
Relies on the left hand to prevent the
main clamp from slipping.
| Vertical weight is securely cradled and the
lateral and posterior/anterior adjustments
are independent so they bear far less weight
of the instrument and are, therefore, more
secure. Nothing is required of the left hand
to maintain lateral and posterior/anterior
adjustments. |
Takes about thirty to forty seconds
to remove the vest and the clamp
for storage. | Detaches from the trombone in about four seconds |
Has all connective stress on the
trombone focused in one location,
making it prone to wear and slippage
as leverage works against its proper
functioning component part. | Distributes the weight and imbalances of the
trombone over three points of connection.
Each connection uses leverage to its
advantage to reduce wear on each
|
Is visually prominent, draws attention
to the fact that the player is using a
stand attachment
| Is visually subtle, drawing less attention to
the fact of it being used - - unless one chooses bright-colored straps. Also has a more aesthetic appearance - - less bulky; customizing options |
Main clamp may remain attached to
the trombone (although I did not find
this to be an advantage because I had
to disassemble it again when re-attaching
it to the main stem for use) | The only requirement for any part to remain
attached to the instrument during storage is a silcon tube stay |
Vest attachment puts the weight of the
trombone on the upper torso - - the
respiration center of the body
| Belt clip attachment puts the weight on the hips
when standing. There is no upper torso involvement
in supporting the trombone |
