The fits of the hull parts is not perfect - Heller's ship mouldings are decidedly soft-edged - and I required plasticard slivers and a fair amount of putty to blend the separate hull and bow sections together smoothly. The conning tower top too needs to be faired in using plasticard and putty. The rear of the bridge structure requires a greater angle towards the horizontal, according to photos of the Daphne class boats. The bridge details - periscopes, radars, masts - are probably correct for the original design, but certainly not for the South African boats. In any event, I suggest replacing all these additions with stretched sprue. Also, there are fairings on either side of the bridge top which are missing. What I think is a snorkel mast is situated at the aft end of the bridge, and requires cutting away part of the port side of the bridge.

The hull details are deeply engraved - much in the style of the Matchbox trenchdigger! The inscribed panels and recesses in the hull are incorrectly positioned and far too large. The inscribed upper casing lines should be filled, as they are not visible at this scale. The quad of holes on each side of the aft hull also needs to be filled, and then re-cut much smaller. A rectangular slot must be cut in the aft hull forward of the holes described above. The forward casing has a characteristic indentation or lip near the bow which needs to be added. A No.15 scalpel blade can be used to carve out the shape, and No.11 blade to trim the edges. Vent holes along the casing need to be drilled.

The bow planes and the aft planes behind the screws ought to be discarded and replaced with much thinner items made from thin stock plasticard. The outlines of the kit parts are accurate though, so they can be used as a pattern. The wavy section of the aft planes mentioned above is not visible in photos, so I dispensed with it. The rudder can use with some thinning down but is otherwise acceptable. The propeller shafts and supporting struts are also visible in the photo, and the kit parts can be used as a pattern for making new ones out of plasticard and stretched sprue. The result is much more pleasing than using the kit parts which are overly thick.  The propellers themselves are fine, the blades merely needing some thinning down.

The complicated arrangement of the propeller guards can be replicated with stretched sprue and superglue to hold the fine structure together. Again, the kit parts can be used as a pattern. The square aft casing with its four external tubes is correct for the original design, as well as for SAS Maria van Riebeeck (S97), but SAS Emily Hobhouse (S98) has a different arrangement. I cannot ascertain what the third submarine in the SA Navy looks like at present. So all in all a quite delightful little kit, which is simple too build, and elegant in appearance.