15kg is too heavy astrophotographically for an HEQ5 - more like 12kg MAXIMUM. The Chinese load limits (17kg for the HEQ5) are both OPTIMISTIC as well as being ALL UP WEIGHT - not photographic.
DEFINITELY need a finderscope guider if using an HEQ5 with this setup. I bought one of the Orion mini's (pretty average finderscope!), took the adapter off and put it on a Takahashi finder (same thread etc). Works delighfully, and is LIGHT.
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