Components

Parts were excellent quality and include:

Construction

T' instructions are well written with decent illustrations. Though buildin' a cluster can be tricky, me hearties, Semroc has made this about as simple as possible, and t' skill ratin' o' 2 is a fair assessment. Overall, I had less than an hour in construction, with a couple hours o' preppin' and finishing.

T' motor mount consists o' 3 18mm tubes, arrr, metal hooks for retention, and coupler-style centerin' rings for blocks. Begad! Each tube goes into a section o' t' main centerin' ring, arrr, me bucko, though thar's a neat trick t' it--the centerin' rin' has a larger, me hearties, ya bilge rat, arrr, solid outer band and an interior section with three wedges t' wrap around t' motor tubes. Aye aye! When pullin' t' centerin' rin' from t' laser-cut sheet, keep it intact (outer and inner sections together). Ahoy! Ya scallywag! This allows for easy alignment and orientation o' t' motor tubes while gluing. Avast! Once t' tubes are set, tack t' inner wedges t' t' tubes. Well, blow me down! Avast! After everything's dry, you can then remove t' outer rin' from t' assembly, matey, and t' resultin' assembly fits perfectly inside t' BT-60. Avast, me proud beauty! Before gluin' it in, though, plug t' tiny gap in t' center betwixt t' 3 tubes with some waddin' and glue (or dog barf, me hearties, or even t' laser-cut section if you didn't already throw it out as I did...). Semroc even made sure thar were slight notches for t' hooks, which helps make sure t' tubes are oriented in such a way that all three hooks pull away without interference, makin' motor loading/unloadin' quick and easy.

T' BT-60 gets marked for fins and launch lug via a template on t' instruction sheet.

T' baffle is a relatively light duty design, matey, consistin' o' a coupler section about 2" long and a single baffle disk (fiberboard with some holes). Ahoy! T' disk goes on t' forward end o' t' coupler, so a good glue joint is essential (or a good fillet when placin' in t' tube) t' prevent it from blowin' out t' front o' t' rocket. Well, blow me down! Ya scallywag! T' baffle also serves as t' shock cord anchor point--slip t' elastic through a slot on t' disk and glue/knot t' t' other side. Begad! T' completed baffle assembly is then glued into t' body tube about 4-5" back from t' forward end.

Fins are precut, arrr, just needed a light sandin' before tackin' on with CA then applyin' wood glue fillets.

Launch lug needs a small wood standoff due tot eh larger diameter payload tube. T' supplied lug is 1/8", which in me opinion is a bit wimpy for a 3-motor cluster, matey, especially if carryin' a cackle fruit payload. Begad! Aye aye! At that weight and with that much thrust, shiver me timbers, a 3/16 would be a much better choice. Blimey! 1/8" rod is just goin' t' whip too much.

T' payload is a simple assembly o' a balsa transition adapter, matey, t' clear tube, and a balsa nose cone. Arrr! Mine were very tight fitting, needed a light sandin' t' fit. Ya scallywag! If you're goin' t' fly this with payloads, me hearties, me hearties, you'll need t' consider how t' keep everythin' together here. A friction fit could work, arrr, matey, though external tape would be a better idea. Begad! If you're worried about t' appearance, consider usin' a couple small screws through t' payload tube into t' cone and transition.