Попробуйте поискать Y-СЕРВОУДЛИНИТЕЛЬ. Используется для соединения элеронов, флаперронов или двух сервомашинок вместе. А аппа подойдет любая от 5 каналов. У меня Turnigy 9X (Mode 2). По колесам - вариантов много. Я замуровывал качалки от сервы в диск при помощи холодной сварки, утяжеляя их при этом и тем самым опуская центр тяжести. Но при таком способе поймать соосность весьма проблематично. Сейчас склоняюсь к тому, чтобы в уже утяжеленное колесо просто вставить стандартную дисковую качалку от сервы, обрезанную по внутреннему размеру колеса. Крепил колесо через сквозное отверстие в ступице, как простую качалку.
Извините меня за оффтоп, есть такой вариант www.lanoeq.com/…/6988118 toy bobcat.htm (не реклама) Модель более реалистична и внешне очень похожа на оригинал.
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