Hi Donny and firehead.
Let me see if I can answer all the questions. Weight: 8 Kg (baby pro, 1 tier) against around 14 Kg (Apex 48BP Plus, two tiers, extra-log arms, mic boom). Load capacity: 35 Kg per tier. Price [Baby Pro, 1 tier]: Euro 159 (varies according to model). I'm sure an harmonizer can be placed in the upper tier with no problems. No, Donny, the tiers cannot close or open wider (due to the design constraints). The arms have a minimum length, that can be extended to accomodate bigger keyboards (Pro model) but the angle between the arms cannot be changed.
Where can it be found? K&M is a german brand (
www.k-m.de) so you will easily find it in the main german online stores. A few examples:
http://www.thomann.de/ ,
http://www.musik-produktiv.de/ ... No idea whether it can purchased in the USA.
-- José.