Pugwash

One of the kits I recently unearthed in my loft stash was this 1/72 VVS Wyvern. It is an injection moulding with white metal parts, possibly of Eastern European origin. It's probably not the best choice to re-start my modelling after a 30 year gap. I wonder if anyone has completed one of these and could highlight the pitfalls (and identify the missing part from the second sprue ). The instructions are somewhat basic..