Considering the varying geometries and weight distributions of eBikes, do manufacturers of bike racks and carriers provide clear guidelines or certifications for compatibility with specific eBike models, or is it largely a matter of trial and error to find a suitable rack or carrier that can safely transport an eBike without damaging the bike or the rack? Are there any industry-wide standards or regulations that dictate the design and testing of bike racks and carriers for eBike compatibility, or is it a Wild West of experimentation and adaptation? What innovative solutions or features are being developed by manufacturers to address the unique challenges of transporting eBikes, such as integrated torque arms or adjustable wheel trays?